L.G.Balakrishnan & Bros Ltd

Silent
Chains

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Silent Chain

Silent chains are utilised in timing / cam drive application in automotive engines for reduced noise and vibration. The reduced noise and vibration is due to the lower engagement angle and conjunctive type of link engagement with the sprocket, when comparing bush and roller chain.

The applications not only limited to cam and timing drives, but also extensively used in front wheel power transmission in four-wheel drives.

LGB silent chain links are unique in design for the improved noise characteristics and a good load sharing between the link plates.

The Silent Chain Advantage

The silent chain drives combine the flexibility, quietness of the belt and the positive drive, durability of the gears
When the chain pitch elongates, the link plates move out ward and engages the sprocket on a correspondingly larger pitch circle. The load is therefore evenly distributed over the sprocket teeth engaging the chain.

The Silent Chain features

 SILENT CHAIN FOR CAM / OIL PUMP & OTHER ENGINE MECHANISM



2 X 3 (6.35 pitch) LACING

3 X 4 (6.35 pitch) LACING

4 X 5 (6.35 pitch) LACING

4 X 5 (6.35 pitch) E

4 X 4 ( 8.00 pitch ) LACING

4 X 4 ( 7.70 pitch ) LACING

ROLON
CHAIN NO. 
ISO
CHAIN NO. 
LACING 
PATTERN 
PITCH  WIDTH
BETWEEN
GUIDE
LINK 
PIN DIAMETER  PIN WIDTH  OVER ALL
WIDTH 
PLATES THICKNESS  ULTIMATE
TENSILE
STRENGTH
(min.) (KN)  
AVERAGE
CHAIN
MASS FOR
100 PITCHES
  (kg)                            
[P]  Ød1  b1     t1  t2 
(min.)  (max.)  (max.)  (max.) 
mm 
SL623N  2 X 3  6.35 3.25 2.42 6.1 6.95 1 0.72 5.1
SL623ND 
SL623NC  0.11
SL634N  3 X 4  6.35 5.34 2.42 8.4 6.95 1 0.72 7.16
SL634ND 
SL634NC  0.16
SL634H  3 X 4  6.35 6.5 2.42 9.8 6.95 1.2 0.72 9.12 0.18
SL645HN  4 X 5  8.9 12.41 1 13.34 0.24
SL645EAC  4 X 5  6.35 7.6 2.41 10.7 7.34 1 0.72 34.14 0.23
SL844AV 4 X 4  8.0 7.955 12.39 9.85 1.25 1.01 31.17
SL7744A 4 X 4  7.7 8.85 3.288 12.85 9.71 1.4 1.01 32.75

 SILENT CHAIN FOR FOUR WHEEL DRIVE

9 X 8 LACING

ROLON
CHAIN NO. 
ISO
CHAIN NO. 
LACING 
PATTERN 
PITCH  WIDTH
BETWEEN
GUIDE
LINK 
PIN DIAMETER  PIN WIDTH  OVER ALL
WIDTH 
PLATES THICKNESS  ULTIMATE
TENSILE
STRENGTH
(min.) (KN)  
AVERAGE
CHAIN
MASS FOR
100 PITCHES
(kg)                            
[P]  Ød1  b1     t1  t2 
(min.)  (max.)  (max.)  (max.) 
mm 
SL127898 - 9 X 8 12.78 23.9 4.77 28.7 16 1.5 1.27 165.3 2.8