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Introduction

Variators

Type: VA – B

Size: 0 – 6

Control range: 1:3; 1:4,5; 1:6

Output: 0,85 – 21 kW

General design

General design

The mechanical variable speed chain gear-boxes are one of the systems of infinitely variable speed gears assuming a dominant position in the driving technique for the transmission of little and mean outputs.

Owing to their properties, such as:

  • the sufficiently large control range
  • the suitable control characteristic
  • the minimum drop of speed when loaded
  • the minimum claims for maintenance
  • the simple manipulation

the mechanical variable speed gear-boxes with plate-link chains range with the most demanded types.

Basic information

Basic information

Conception

Variators in the basic design solve all requirements for infinitely variable gears from 0.85 to 21 kW outputs, with control range up to max. 1:6 and with optional output speed. All this is achieved by a purposeful division of the variable speed gearbox sizes and by a suitable connection with countershafts of unit-construction design on input and output sides.

Variable speed gear-boxes hold the speed at an optional value even at a variable load, as the power transmission is without slip. The advantage of these machines is the minimum requirements for space.

The output of the basic variable speed gear-box may be increased up to 55 kW by connecting a differential countershaft on the variable speed gear-box input side with the simultaneous reduction of the control range.

The output speed range may be increased, further, by connecting a satellite or movable layshaft on the variable speed gear-box output side.

Variable speed change

Basic elements of the infinitely variable speed change variable by the speed gear-boxes are two pairs of conical grooved disks and a plate-link chain. Grooved disks are fitted on driving and driven shafts and are axially movable on the same. Between these two pairs of disks there is directed and endless platelink chain which connects both pairs of disks – it changes the rotary motion of driving disks to the rectilinear one and on driven disks to the rotary motion again. The endless plate-link chain consists of a number of links which are mutually connected with pins; crosswise slidable plates are arranged inside the links.

The gear ratio may be changed so that disks of one pair are forced together, disks of the other pair are removed in dependence upon the first pair. In the pair of disks forced to each other, the chain gets moved to a larger diameter, in the opposite pair of disks, it gets moved to a smaller diameter. The required gear ratio is set up by means of two-armed levers being pivoted on a centric bolt.

Service factors

The values of outputs and torques stated in the tables apply to a normal single-shift operation and for not too frequent starting. In case of other operating conditions, an equivalent output must be ascertained for the determination of the variable speed gear-box size. To this effect the coefficients stated in the following table should be applied:

Operating conditions Coefficient
Number of starts
in a hour		  10  1 ks
 above 10 1,3
Number
of operating hours		  up to 8  1 kh
from 6 up 16 1,3
from 16 up 24 1,5
Character
of load		 permanent  1 kz
intermittent 1,3
impact 1,5

Determination of equivalent output

Example:
The determination of the variable speed gear-box size for driving a machine with following requirements:

 Infinitely variable speed control within ……………  420-1250
 Output Ns  at nmin ………………………  approx. 0,75kW
   at nmax ……………………..  approx. 1kW
 Number of startings ……………………………….  up to 10/hour
 Character of operation ……………………………  continuous
 Load …………………………………………….  impact

 

Determination of equivalent output:

 Nmin  = Ns x ks x kh x kz
 = 0,75 x 1 x 1,5 x 1,5
 = 1,68 kW
 Nmax  = Ns x ks x kh x kz
 = 1 x 1 x 1,5 x 1,5
 = 2,25 kW

On the basis of calculated values, there should be chosen „2“ variable speed gear-box with following values according to tables:

Driving speed n = 720 ot/rpm
Output speed nmin = 415 ot/rpm
nmax = 1245 ot/rpm
Output Nmin = 1,9 kW
Nmax = 2,6 kW

Control range

The control range of the variable speed gear-box is understood the ratio of the minimum and maximum output speeds. The maximum control range variable speed gear-boxes is 1:6.

Typified control ranges with which the variable speed gear-boxes are currently delivered rate 1:3, 1:4.5 and 1:6. Upon the buyer’s wish, the variable speed gear-box may be adjusted for any control range up to 1:6.

Speed, output, torque of variable speed gear-box

The upper limit recommended for the variable speed gear-box output shaft speed is 1800 r.p.m. and the recommended lower limit is 200 r.p.m.

The typified variable speed gear-boxes (with driving speeds specified in tables) includes the optimum number of gear ratio kinds mutually tuned up with output. The values of output and torques are stated with respect to the efficiency of gears on the countershaft.

Every basic variable speed gear-box type has several variants according to the selected control way and position of the control system, according to the arrangement of input and output shafts and according to the cover position in vertical variable speed gear-boxes.

Technical specification of variators‘ regulating mechanism

The shaft ends are designed according to the ISO. Standards at k7 and provided with tapped pits according to Czechoslovak State Standard LSN 01 4917. Keys according to Czechoslovak State Standard ESN 02 2562. The axial height of shafts is within

tolerance of ± 1/600 H

The indicator and the control wheel must be situated on the same side of the variable speed gear-box. In the place of the control wheel there may be used the mechanical or electrical remote control.

The upper cover may be on A or B sides.

The variable speed gear-box should be situated so that the upper cover may be accessible for the reason of adjusting the variable speed gear-box or replacing the chain and oil. The mentioned oil quantity and mass are average values. A part view of the control part of the variable speed gear-box shows the design with pin control. The control by the regulating pin is not self-locking.

Supplied flange electromotors for sizes 0-6:

Size Transmission ratio Regulating screw Regulating pin
Output speed Torque Adjusting angle Torque
0 1:3 9 0,5 41° 1
1:4,5 10,25 51°
1:6 12 60°
1 1:3 8,15 0,7 48° 2
1:4,5 9,45 57°
1:6 10,75 66°
2 1:3 8,2 0,85 39° 4
1:4,5 10 47°
1:6 10,8 51°
3 1:3 10,5  1 45° 6
1:4,5 12,65 52°
1:6 13,25 56°
4 1:3 12,2 1,3 42° 10
1:4,5 14,7 57°
1:6 17,4 63°
5 1:3 15,3 1,5 48° 18
1:4,5 18,3 54°
1:6 19,6 58°
6 1:3 15 2 48° 30
1:4,5 18,6 53°
1:6 19,6 59°
Size Motor kW V Hz
„0“ 4 AP 80-4 0,75 380/220 50 (60)
„1“ 4 AP 90 L-4 1,5 380/220 50 (60)
„2“ 4 AP 100 L-4 3 380/220 50 (60)
„3“ 4 AP 112 M-4 5,6 (4) 380/220 50 (60)
„4“ 4 AP 132 M-4 7,5 380/220 50 (60)
„5“ VC 160 L-4 15 380/220 50 (60)
„6“ VC 180 L-4 22 380/220 50 (60)

Designation

Designation

The table is intended for the precise determination of the type number. The variable speed drive proper is determined by five digits, the further two digits indicate the appertaining control. If there is concerned a combination of the variable speed drive with a gearbox, it is expressed according to the construction and size together with the clutch by other two digits. Designs of various positions of variable speed gear-boxes are stated in the table. If the conditions allow, it is the best to prefer two basic positions – horizontal position with feet or vertical position with feet. In case of vertical positions, the regulating screw is located in the upper part as far as possible. When the variable speed gear-box is built in a machine, it is necessary that it may be situated outside to facilitate access and inspection. The variable speed gear-box without countershaft only may be mounted on the flange. 

a)Type: VA – variator

b) Size:

code 0 1 2 3 4 5 6
power transmission [kW] 0,85 1,7 3,4 5,6 8,7 14,8 21

c) Control range:

 
code 0 1 2
control range 1:3 1:4,5 1:6

d) Chain final tightener:
Letter „B“ after the second figure says the variator is provided by automatic chain final yokeless tightener.

e) Design of input:

 
code 1 2 3 4 5
 
Countershaft simple with single coun. with double coun. with triple coun. with planet coun.
code 6 7 8 9  
   
Countershaft with movable countershaft with countershaft
with bevel gears		 single worm
countershaft		 double worm
countershaft		  

f) Drive execution:

 
code 0 1 2 3 4 8
 
Execution foot-type motor flanged motor motor on the box reduction from motor flanged motor,
safety clutch		 differential gear

g) Position:

 
code 1 2 3 4
 
Position horizontal vertical suspended vertical vertical, fixed on the side
code 5 6 7  
   
Position suspensed horizontal horizontal, fixed on the flange vertical, fixed on the flange  

h) Regulation:

 
code 0 1 2 3 4
 
Regulation manual with indicator manual without indicator by regulation pin manual with special indicator remote mechanical DM1
code 5 6 7 8  
   
Regulation remote mechanical DM2 remote mechanical DM3 electrical remote
horizontally		 electrical remote
vertically		  

i) Location of Regulation:

 
code 0 1 2 3 4
 
Location of regulation regulating screw up regulating screw down regulating screw on the left regulating screw on the right regulating pin up
code 5 6 7 8 9
 
Location of regulation regulating pin on the left regulating pin on the right regulating pin up with indicator reg. pin on the left with indicator reg. pin on the right with indicator

Example of type number determination

A variable speed gear-box for transmission of 4 kW output with the control range of 1:4.5. Driving speed of 830 r.p.m., output speed of 177 to 796 r.p.m. Driven by a foot-type electric motor situated off the variable speed gear-box – by means of V-belts. Horizontal type of the variable speed gear-box. Hand control with a speed indicator. The regulating screw is situated on the left (when looked at from the output of the variable speed gear-box shaft).

 

Variable speed gear-box for 4 kW transmission first digit 3
Control range 1:4.5 – gear ratio second digit 1
Output speed 177 to 796 r.p.m. at driving speed 830 r.p.m. – 
this a variable speed gear box witha single countershaft		 third digit 2
Driven by a foot-type motor fourth digit 0
Horizontal type fifth digit 1
Hand control with indicator sixth digit 0
Regulating screw on the left seventh digit 2

 

 

The variable speed gear-box type is then:
VA31B201-02

 

 

Foot-type motors are not included in the delivery subject matter.

Instructions for ordering

In order that we may deliver a variable speed gear-box a correct design according to your choice, we ask you kindly to state technical data according to following instructions in your order. As far as all your requests are not contained in the instructions, kindly let us have the same or send us a diagrammatic sketch.

Technical parameters

Technical parameters

simple
VA**B1**-**

variator input output
control ratio
1:3 1:4,5 1:6
n1 n2 P Mk n2 P Mk n2 P Mk
min-1 min-1 kW Nm min-1 kW Nm min-1 kW Nm
    chain chain chain
0   L 031 L 030 L 030
950 1644 0,75 4,3 2016 0,75 3,5      
548 0,66 11,5 448 0,47 10      
930 1437 0,78 5 1760 0,75 4,1 2028 0,65 3
479 0,58 11,5 391 0,47 11,5 338 0,35 10
720 1245 0,65 5 1525 0,65 4,1 1764 0,65 3,4
415 0,5 11,5 339 0,41 11,5 294 0,35 11,5
600 1038 0,54 5 1273 0,54 4,1 1470 0,54 3,4
346 0,42 11,5 283 0,34 11,5 245 0,3 11,5
1   L 232 L 231 L 231
950 1644 1,5 8,7 2016 1,5 7      
548 1,26 22 448 0,9 19      
830 1437 1,5 10 1760 1,5 8,2 2028 1,3 6
479 1,1 22 391 0,9 22 338 0,68 19
720 1245 1,3 10 1525 1,3 8,2 1764 1,3 7
415 0,95 22 339 0,78 22 294 0,68 22
600 1038 1,1 10 1273 1,1 8,2 1470 1,1 7
346 0,8 22 283 0,65 22 245 0,56 22
2   VZ 327 VZ 326 L 236
950 1644 3 17,5 2016 3 14      
548 2,5 44 448 1,8 38      
830 1437 3 20 1760 3 16,5 2028 2,6 12
479 2,2 44 391 1,8 44 338 1,35 38
720 1245 2,6 20 1525 2,6 16,5 1764 2,6 14
415 1,9 44 339 1,56 44 294 1,35 44
600 1038 2,15 20 1273 2,15 16,5 1470 2,15 14
346 1,6 44 285 1,3 44 245 1,1 44
3   VZ 335 VZ 334 VZ 333
950 1644 5 29 2016 5 24      
548 4 70 448 2,85 60      
830 1437 4,95 33 1760 4,95 27 2028 4,3 20
479 3,5 70 391 2,85 70 338 2,15 60
600 1038 3,6 33 1273 3,6 27 1470 3,6 23
346 2,5 70 283 2,1 70 245 1,8 70
4   VZ 434 VZ 433 VZ 433
950 1644 7,5 43 2016 7,5 35      
548 6 105 448 4,3 90      
830 1437 7,5 50 1760 7,5 41 2028 6,65 31
479 5,25 105 391 4,3 105 338 3,2 90
720 1245 6,65 51 1525 6,65 42 1764 6,65 36
451 4,55 105 339 3,7 105 294 3,2 105
600 1038 5,55 51 1273 5,55 42 1470 5,55 36
346 3,8 105 283 3,1 105 245 2,7 105
5   VZ 541 VZ 540 VZ 539
950 1644 14,8 86            
548 11,5 200            
830 1437 12,9 86 1760 12,9 70      
479 10 200 391 8,2 200      
720 1245 11,1 86 1525 11,1 70 1764 11,1 60
415 8,7 200 339 7,1 200 294 6,1 200
600 1038 9,3 86 1273 9,3 70 1470 9,3 60
346 7,2 200 283 5,9 200 245 5,1 200
6   VZ 638 VZ 637 VZ 636
650 1125 20,9 178            
375 12,7 325            
550 954 17,8 178 1170 17 140 1350 17 120
318 10,8 325 260 8,8 325 225 7,6 325

 

 

 

with single countershaft
VA**B2**-**

variator   input output
control ratio
1:3 1:4,5 1:6
i n1 n2 P Mk n2 P Mk n2 P Mk
min-1 min-1 kW Nm min-1 kW Nm min-1 kW Nm
      chain chain chain
0     L 031 L 030 L 030
2,2 950 747 0,71 9,5 918 0,71 7,4      
249 0,63 24 204 0,45 20      
830 651 0,71 10,5 801 0,71 8,5 924 0,62 6,4
217 0,55 24 178 0,45 24 154 0,33 20
720 567 0,62 10,5 693 0,62 8,5 798 0,62 7,1
189 0,47 24 154 0,39 24 133 033 24
3,62 950 453 0,71 15 553 0,71 12      
151 0,63 39 123 0,45 34      
830 396 0,71 17 486 0,71 14 558 0,62 10
132 0,55 39 108 0,45 39 93 0,33 34
720 342 0,62 17 423 0,62 14 486 0,62 11,7
114 0,47 39 94 0,39 39 81 0,33 39
6 950 273 0,71 25 337 0,71 20      
91 0,57 60 75 0,43 55      
830 240 0,71 28,5 292 0,71 23,4 336 0,62 17
80 0,5 60 65 0,41 60 56 0,32 55
720 207 0,62 28,5 256 0,62 23,4 294 0,62 17,4
69 0,43 60 57 0,36 60 49 0,31 60
1     L 232 L 231 L 231
2,21 950 744 1,42 18 913 1,42 15      
248 1,2 46 203 0,85 40      
830 651 1,42 21 796 1,42 17,2 918 1,23 13
217 1,04 46 177 0,85 46 153 0,65 40
720 564 1,23 21 688 1,23 17,2 798 1,23 14,7
188 0,9 46 153 0,74 46 133 0,65 46
3,615 950 456 1,42 30 558 1,42 24      
152 1,2 75 124 0,85 65      
830 396 1,42 34 486 1,42 28 564 1,23 21
132 1,04 75 108 0,85 75 94 0,65 65
720 345 1,23 34 422 1,23 28 486 1,23 24
115 0,9 75 94 0,74 75 81 0,65 75
6 950 273 1,42 50 337 1,42 40      
91 0,95 100 75 0,78 100      
830 240 1,42 57 292 1,42 47 336 1,23 35
80 0,84 100 65 0,68 100 56 0,58 100
720 207 1,23 57 256 1,23 47 294 1,23 40
69 0,72 100 57 0,59 100 49 0,51 100
2     VZ 327 VZ 327 VZ 236
2,21 950 744 2,85 36 913 2,85 30      
248 2,37 92 203 1,7 80      
830 651 2,85 42 796 2,85 34 918 2,47 26
217 2,09 92 177 1,7 92 153 1,28 80
720 564 2,47 42 688 2,47 34 798 2,47 30
188 1,8 92 153 1,48 92 133 1,28 92
3,615 950 456 2,85 60 558 2,85 48      
152 2,37 151 124 1,7 130      
830 396 2,85 68 486 2,85 56 564 2,47 42
132 2,09 151 108 1,7 151 94 1,28 130
720 345 2,47 68 422 2,47 56 486 2,47 48
115 1,8 151 94 1,48 151 81 1,28 151
6 950 273 2,85 100 337 2,85 80      
91 1,9 200 75 1,57 200      
830 240 2,85 114 292 2,85 94 336 2,47 70
80 1,67 200 65 1,36 200 56 1,17 200
720 207 2,47 114 256 2,47 94 294 2,47 81
69 1,44 200 57 1,19 200 49 1,02 200
3     VZ 335 VZ 334 VZ 333
2,208 950 744 4,75 61 913 4,75 50      
248 3,8 147 203 2,7 127      
830 651 4,7 69 796 4,7 56 918 4,05 42
217 3,3 147 177 2,7 147 153 2,05 127
720 564 4,05 69 688 4,05 56 798 4,05 49
188 2,9 147 153 2,35 147 133 2,05 147
3,6 950 456 4,75 100 558 4,75 80      
152 3,8 239 124 2,7 208      
830 399 4,7 112 491 4,7 92 564 4,05 68
133 3,3 239 109 2,7 239 94 2,05 208
720 345 4,05 112 422 4,05 92 492 4,05 79
115 2,9 239 94 2,35 239 82 2,05 239
6 950 273 4,75 165 337 4,7 135      
91 2,85 300 75 2,35 300      
830 240 4,7 188 292 4,7 154 336 4,05 115
80 2,5 300 65 2,05 300 56 1,76 300
720 207 4,05 188 256 4,05 154 294 4,05 132
69 2,15 300 57 1,8 300 49 1,54 300
4     VZ 434 VZ 433 VZ 433
2,2 950 747 7,1 90 918 7,1 74      
249 5,7 219 204 4,05 190      
830 651 7,1 105 801 7,1 85 924 6,3 65
217 5 219 178 4,05 219 154 3,05 190
720 567 6,3 106 693 6,3 87 798 6,3 75
189 4,35 219 154 3,5 219 133 3,05 219
3,6 950 456 7,1 150 558 7,1 122      
152 5,7 359 124 4,05 310      
830 399 7,1 170 490 7,1 140 564 6,3 107
133 5 359 109 4,05 359 94 3,05 310
720 345 6,3 174 423 6,3 142 492 6,3 123
115 4,35 359 94 3,5 359 82 3,05 359
6,077 950 270 7,1 250 333 7,1 205      
90 4,7 500 74 3,85 500      
830 237 7,1 285 288 7,1 235 336 6,3 180
79 4,1 500 64 3,35 500 56 2,95 500
720 204 6,3 294 252 6,3 240 288 6,3 208
68 3,55 500 56 2,95 500 48 2,5 500
5     VZ 541 VZ 540 VZ 539
2,2 950 747 14,1 180            
249 10,9 418            
830 651 12,2 180 801 12,2 146      
217 9,5 418 178 7,8 418      
720 567 10,5 180 693 10,5 146 800 10,5 126
189 8,3 418 154 6,7 418 133 5,8 418
3,615 950 456 14,1 295            
152 10,9 687            
830 396 12,2 295 486 12,2 240      
132 9,5 687 108 7,8 687      
720 345 10,5 295 422 10,5 240 486 10,5 206
115 8,3 687 94 6,7 687 81 5,8 687
6 950 273 14,1 490            
91 8,6 900            
830 240 12,2 490 292 12,2 399      
80 7,5 900 65 6,1 900      
720 207 10,5 490 256 10,5 399 294 10,5 342
69 6,5 900 57 5,4 900 49 4,6 900
6     VZ 638 VZ 637 VZ 636
1,25 650 900 19,9 211            
300 12,1 386            
550 765 16,9 211 936 16,1 165 1080 16,1 142
255 10,3 386 208 8,4 386 180 7,3 386
1,63 650 690 19,9 275            
230 12,1 503            
550 585 16,9 275 720 16,1 215 828 16,1 186
195 10,3 503 160 8,4 503 138 7,3 503
2,29 650 492 19,9 387            
164 12,1 707            
550 417 16,9 387 514 16,1 300 588 16,1 261
139 10,3 707 114 8,4 707 98 7,3 707
3,8 650 297 19,9 642            
99 12,1 1170            
550 252 16,9 642 306 16,1 505 354 16,1 435
84 10,3 1170 68 8,4 1170 59 7,3 1170
4,823 650 234 19,9 815            
78 11,4 1400            
550 198 16,9 815 243 16,1 640 282 16,1 550
66 9,7 1400 54 7,9 1400 47 6,9 1400

 

 

 

with double countershaft
VA**B3**-**

variator   input output
control ratio
1:3 1:4,5 1:6
i n1 n2 P Mk n2 P Mk n2 P Mk
min-1 min-1 kW Nm min-1 kW Nm min-1 kW Nm
      chain chain chain
0     L 031 L 030 L 030
9,8 950 168 0,68 39 207 0,68 31      
56 0,59 101 46 0,42 88      
830 147 0,68 44 180 0,68 36 204 0,58 27
49 0,52 101 40 0,42 101 34 0,32 88
720 126 0,58 44 157 0,58 36 180 0,58 30
42 0,44 101 35 0,37 101 30 0,32 101
16,15 950 102 0,68 64 126 0,68 52      
34 0,53 150 28 0,42 145      
830 90 0,68 72 108 0,68 59 126 0,58 44
30 0,47 150 24 0,38 150 21 0,32 145
720 78 0,58 72 94 0,58 59 108 0,58 50
26 0,41 150 21 0,33 150 18 0,28 150
26,7 950 61,5 0,68 106 75,6 0,68 86      
20,5 0,32 150 16,8 0,26 150      
830 54 0,68 120 65,7 0,68 98 76,2 0,58 73
18 0,28 150 14,6 0,23 150 12,7 0,2 150
720 46,5 0,58 120 57,2 0,58 98 66 0,58 82
15,5 0,24 150 12,7 0,2 150 11 0,17 150
600 39 0,49 120 48 0,49 98 55,2 0,49 82
13 0,2 150 10,6 0,17 150 9,2 0,14 150
1     L 232 L 231 L 231
11,4 950 144 1,35 90 175 1,35 74      
48 1,13 226 39 0,8 195      
830 126 1,35 103 153 1,35 84 180 1,17 62
42 1,0 226 34 0,8 226 30 0,61 195
720 108 1,17 103 135 1,17 84 156 1,17 72
36 0,85 226 30 0,71 226 26 0,61 226
18,6 950 88,5 1,35 145 108 1,35 120      
29,5 1,08 350 24 0,8 320      
830 78 1,35 167 95 1,35 137 108 1,17 103
26 0,95 350 21 0,77 350 18 0,6 320
720 66 1,17 167 81 1,17 137 94 1,17 117
22 0,8 350 18 0,66 350 15,7 0,57 350
30,9 950 54 1,35 240 65,2 1,35 198      
18 0,66 350 14,5 0,53 350      
830 46,5 1,35 278 57,2 1,35 228 66 1,17 170
15,5 0,57 350 12,7 0,46 350 11 0,4 350
720 40,2 1,17 278 49 1,17 228 57 1,17 195
13,4 0,49 350 11 0,4 350 9,5 0,35 350
600 33,6 0,98 278 41 0,98 228 48 0,98 195
11,2 0,41 350 9,1 0,33 350 8 0,29 350
2     VZ 327 VZ 326 L 236
11,05 950 150 2,7 172 180 2,7 143      
50 2,25 437 40 1,6 380      
830 129 2,7 199 157 2,7 164 186 2,35 120
43 2 437 35 1,62 437 31 1,2 370
720 114 2,35 199 139 2,35 164 162 2,35 141
38 1,7 437 31 1,4 437 27 1,2 437
18,07 950 90 2,7 285 112 2,7 230      
30 2,04 650 25 1,6 610      
830 79,5 2,7 325 99 2,7 268 114 2,35 197
26,5 1,8 650 22 1,5 650 19 1,2 600
720 69 2,35 325 85 2,35 268 96 2,35 231
23 1,56 650 19 1,29 650 16 1,09 650
30 950 54 2,7 480 67 2,7 385      
18 1,22 650 15 1 650      
830 48 2,7 540 58 2,7 445 67,8 2,35 330
16 1,09 650 13 0,88 650 11,3 0,77 650
720 42 2,35 540 50,8 2,35 445 58,8 2,35 383
14 0,95 650 11,3 0,77 650 9,8 0,67 650
600 34,5 1,95 540 42,3 1,95 445 49,2 1,95 383
11,5 0,78 650 9,4 0,64 650 8,2 0,56 650
3     VZ 335 VZ 334 VZ 333
10,72 950 153 4,5 280 189 4,5 225      
51 3,6 675 42 2,55 580      
830 135 4,45 318 162 4,45 260 189 3,85 195
45 3,15 675 36 2,55 675 31,5 1,9 580
720 117 3,85 318 144 3,85 260 165 3,85 222
39 2,75 675 32 2,25 675 27,5 1,95 675
17,5 950 93 4,5 460 117 4,5 365      
31 3,6 1100 26 2,55 940      
830 81 4,45 520 99 4,45 425 114 3,85 320
27 3,15 1100 22 2,55 1100 19 1,9 950
720 72 3,85 520 85 3,85 425 102 3,85 362
24 2,75 1100 19 2,25 1100 17 1,95 1100
29,7 950 57 4,5 765 69,3 4,5 620      
19 2,58 1300 15,4 2,1 1300      
830 49,2 4,45 865 60,3 4,45 708 69,6 3,85 530
16,4 2,23 1300 13,4 1,82 1300 11,6 1,6 1300
720 42 3,85 865 52,2 3,85 708 60 3,85 603
14 1,9 1300 11,6 1,58 1300 10 1,36 1300
600 36 3,25 865 43,6 3,25 708 50,4 3,25 603
12 1,63 1300 9,7 1,32 1300 8,4 1,15 1300s
4     VZ 434 VZ 433 VZ 433
10,66 950 153 6,7 420 189 6,7 340      
51 5,35 1000 42 3,85 875      
830 135 6,7 475 166 6,7 385 192 6 300
45 4,7 1000 37 3,85 1000 32 2,9 865
720 117 8 490 144 6 400 168 6 345
39 4,1 1000 32 3,35 1000 28 2,95 1000
17,44 950 93 6,7 690 117 6,7 545      
31 5,35 1650 26 3,85 1420      
830 81 6,7 790 99 6,7 645 117 6 490
27 4,7 1650 22 3,85 1650 19,5 2,9 1420
720 72 6 800 88 6 655 102 6 565
24 4,1 1650 19,5 3,35 1650 17 2,95 1650
29,44 950 55,8 6,7 1150 67 6,7 955      
18,6 4,4 2250 15 3,5 2250      
830 48 6,7 1330 58 6,7 1100 69 6 830
16 3,8 2250 13 3,1 2250 11,5 2,7 2250
720 42 6 1350 51,7 6 1100 60 6 955
14 3,3 2250 11,5 2,7 2250 10 2,35 2250
600 35,4 5 1350 43,1 5 1100 49,8 5 965
11,8 2,8 2250 9,6 2,3 2250 8,3 1,95 2250
5     VZ 541 VZ 540 VZ 539
11,33 950 144 13,2 875            
48 10,2 2040            
830 126 11,5 875 153 11,5 715      
42 9 2040 34 7,3 2040      
720 111 10 875 135 10 715 156 10 612
37 7,8 2040 30 6,4 2040 26 5,5 2040
18,62 950 87 13,2 1440            
29 10,2 3350            
830 78 11,5 1440 95 11,5 1173      
26 9 3350 21 7,3 3350      
720 66 10 1440 81 10 1173 96 10 1005
22 7,8 3350 18 6,4 3350 16 5,5 3350
30,9 950 54 13,2 2390            
18 7,2 3800            
830 45 11,5 2390 57 11,5 1950      
15 6 3800 12,7 5,1 3800      
720 39 10 2390 49,5 10 1950 57 10 1670
13 5,2 3800 11 4,4 3800 9,5 3,8 3800
600 33,6 8,4 2390 41,4 8,4 1950 47,4 8,4 1670
11,2 4,5 3800 9,2 3,7 3800 7,9 3,2 3800
6     VZ 638 VZ 637 VZ 636
6,62 650 171 18,8 1060            
57 11,4 1940            
550 144 16 1060 175 15,3 835 204 15,3 715
48 9,7 1940 39 7,9 1940 34 6,8 1940
9,32 650 120 18,8 1495            
40 11,4 2730            
550 102 16 1495 126 15,3 1175 144 15,3 1010
34 9,7 2730 28 7,9 2730 24 6,8 2730
15,46 650 72 18,8 2480            
24 11,4 4520            
550 61,5 16 2480 76 15,3 1950 87 15,3 1670
20,5 9,7 4520 17 7,9 4520 14,5 6,8 4520
19,58 650 57 18,8 3130            
19 10,5 5280            
550 48,9 16 3130 60 15,3 2460 69 15,3 2110
16,3 9 5280 13,3 7,4 5280 11,5 6,4 5280

 

 

 

with triple counteshaft
VA**B4**-**

variator   input output
control ratio
1:3 1:4,5 1:6
i n1 n2 P Mk n2 P Mk n2 P Mk
min-1 min-1 kW Nm min-1 kW Nm min-1 kW Nm
      chain chain chain
0     L 031 L 030 L 030
59,9 950 27 0,42 150 33,7 0,53 150      
9 0,14   7,5 0,12        
830 24 0,38 150 29,3 0,46 150 33,6 0,53 150
8 0,13   6,5 0,1 150 5,6 0,1  
720 21 0,33 150 25,2 0,4 150 30 0,47 150
7 0,11   5,6 0,09 150 5 0,08  
600 17,1 0,27 150 21,1 0,33 150 24 0,38 150
5,7 0,09   4,7 0,07 150 4 0,06  
1     L 232 L 231 L 231
60 950 27 1 350 33,7 1,2 350      
9 0,33   7,5 0,27 350      
830 24 0,88 350 29,3 1,07 350 33,6 1,1 310
8 03   6,5 0,24 350 5,6 0,2 350
720 21 0,77 350 25,6 0,94 350 30 1,1 350
7 0,26   5,7 0,21 350 5 0,18  
600 17,1 0,64 350 21,2 0,78 350 24,6 0,9 350
5,8 0,21   4,7 0,17 350 4,1 0,15  
2     VZ 327 VZ 326 L 236
60,23 950 27 1,84 650 33,7 2,3 650      
9 0,61   7,5 0,5        
830 24 1,63 650 29,3 2 650 33,6 2,2 620
8 0,54   6,5 0,44   5,6 0,38 650
720 21 1,63 650 25,6 1,74 650 30 2,04 650
7 0,48   5,7 0,39   5 0,34  
600 17,4 1,18 650 21,2 1,44 650 24,6 1,67 650
5,8 0,4   4,7 0,32   4,1 0,28  
3     VZ 335 VZ 334 VZ 333
59,25 950 27,6 3,75 1300 33,7 4,2 1190      
9,2 1,25   7,5 1 1300      
830 24 3,26 1300 29,3 4 1300 33,6 3,5 1000
8 1,1   6,5 0,88   5,6 0,75 1300
720 21 2,85 1300 25,6 3,5 1300 30 3,67 1170
7 0,95   5,7 0,78   5 0,68 1300
600 17,4 2,37 1300 21,2 2,9 1300 24,6 3 1170
5,8 0,79   4,7 0,64   4,1 0,56 1300
4     VZ 434 VZ 433 VZ 433
59,91 950 27 6,35 2250 33,7 6,4 1800      
9 2,1   7,5 1,75 2250      
830 24 5,65 2250 29,3 6,4 2080 33,6 5,65 1600
8 1,9   6,5 1,55 2250 5,6 1,3 2250
720 21 5 2250 25,6 5,65 2110 30 5,65 1830
7 1,6   5,7 1,35 2250 5 1,2 2250
600 17,4 4,1 2250 21,2 4,7 2110 24,6 4,7 1830
5,8 1,35   4,7 1,1 2250 4,1 1 2250
5     VZ 541 VZ 540 VZ 539
60,3 950 27 10,7 3800            
9 3,6              
830 24 9,55 3800 29,3 11 3580      
8 3,2   6,5 2,6 3800      
720 21 8,35 3800 25,6 9,4 3580 29,4 9,4 3070
7 2,8   5,7 2,3 3800 4,9 1,95 3800
600 17,4 6,9 3800 21,2 7,9 3580 24,6 7,9 3070
5,8 2,3   4,7 1,7 3800 4,1 1,65 3800
6     VZ 638 VZ 637 VZ 636
31,13 650 36 17,7 4700            
12 9,4 7500            
550 30,6 15,1 4700 37,7 14,4 3700 43,2 14,4 3170
10,2 8 7500 9,4 6,6 7500 7,2 5,65 7500
55,06 650 20,4 16 7500            
6,8 5,35              
550 17,4 13,7 7500 21,2 14,4 6550 24,6 14,4 5610
5,8 4,55   4,7 3,7 7500 4,1 3,2 7500


Dimensional drawings

Dimensional drawings

VA**B1*1-**
simple

 

VA**B2*1-**
with single countershaft

 

VA**B3**-**
with double countershaft

 

VA**B4**-**
with triple countershaft

 

VA**B1*2-**
simple

 

VA**B2*2-**
with single countershaft

Storage, maintenance

Storage, putting into the operation and maintenance

Plate-link chains

The plate-link chains are attached to the appertaining size of the variable speed gear-box and to the given control range in the table. In the type mark of the chain, the first digit indicates the basic chain size, the following double-digit number indicates the number of links. In the order of spare chains for variable speed gear-boxes, it is necessary to state the type mark of the variable speed gear-box which is shown on the orientation plate. These plate-link chains may be used even in some variable speed gear-boxes from other producers. In the order of chains for these variable speed gear-boxes, it is necessary to state the type and control range of the variable speed gear-box (e.g. AB 2 x 1:3).

Automatic chain final tightener

It is a special equipment of the variable speed gear-box which maintains the prescribed tightening of the plate-link chain within prescribed values for the chain service life automatically, without any operator’s manipulation.

The „L“ model chains will gradually replace the „V“, „VZ“ chains. The comparing table of models „L“ and „V“, „VZ“.

Plate link chains
V, VZ L
V 025 A L 030
V 026 A L 031
VZ 225 A L 231
VZ 226 A L 232
VZ 229 A L 236
VZ 326 A L 329
VZ 327 A L 330
VZ 333 A L 337
VZ 334 A L 338
VZ 335 A L 339
VZ 433 A L 436
VZ 434 A L 437
VZ 539 A L 543
VZ 540 A L 544
VZ 541 A K 545
VZ 636 A L 640
VZ 637 A L 641
VZ 638 A L 642

Chain replacement

The gear ratio in the drive conversion unit is set to 1:1. The screw 5 must be loosened and the safety plate 3 must be turned till the chain is sufficiently loosened. The closing pin is taken out, the new chain is connected to the old one and by pulling out the old chain, the new ahain is drawn into the drive conversion unit. The old chain must be disconnected and the new one coupled by the closing pin. The tension springs 1, 1′ are released by taking them out from the holes in the stop levers 2, 2′ and the levers are shifted against the direction of the tension springs up to the stop into the starting position. The safety plate 3 must then be turned, till the stop levers 2, 2′ can be moved by 2-3 mm. The drive conversion unit must be turned gently at the same time as the safety plate is turned so as to correctly position the chain between the plates. The safety plate 3 must be secured by the screw 5 against turning, the tension springs 1, 1′ must be hung into the holes of the levers 2, 2′ and the drive conversion unit is prepared for operation.

Putting into operation of a variable speed gear-box with an automatic final tightener

Variable speed gear-boxes with automatic final tightener are supplied to the customer after being tested and run-in previously, so that they are serviceable after being filled with oil. If any manipulation in the variable speed gear-box mechanism is made for any reason, it will be necessary to check whether springs 1, 1′ are suspended and whether levers 2, 2′ are in their initial position before putting the variable speed gear-box into operation. Upon a request of the user, the automatic final tightening device can be mounted even in previously produced variable speed gear-boxes.

Lubrication

Variators are delivered including additional equipment without oil filling. The oil is poured into the horizontal and same vertical variators through venting screw on the main cover. Necessary oil quantity is mentioned on the production label of each variator. The kind of the oil filling for variator and additional equipment is mentioned here in the tabel. Replaceable kind has to be same quality and viscosity according to the enviroment temperature.

Table of recommended oils

Enviroment temperature Kind of oil Viscosity
up to 35 °C OT-K8 min 11 mm2s-1 at 100 °C
max 76 mm2s-1 at 50 °C
over 35 °C OT-K12 min 15 mm2s-1 at 100 °C
max 114 mm2s-1 at 50 °C
over 45 °C OT-K18 min 19 mm2s-1 at 100 °C
max 175 mm2s-1 at 50 °C

Oil exchange

The first oil exchange must be made after the first 500 operating hours, than after every 1000 operating hours. Used oil should be discharged warm. Cleaning is allowed only with oil-base drilling fluid, in no case use lamp-oil (kerosene) or other cleaning agents. Manufacturer’s guarantee is valid only under use of recommended oil or equal replacement.

Photogallery

Photogallery