Chain tensioner

Product Photos
  • Adjusts chain slack to maintain normal chain transmission
  • A large amount of chain slack can cause vibration and noise, and can lead to poor meshing with the sprocket, preventing smooth chain transmission.
  • We offer a lineup of four types of chain tensioners to eliminate chain slack: TH, TCS, ETS, and TA.
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Catalogs and Instruction Manuals

How to use a chain tensioner

We have four types available: TCS type, ETS type, TA type, and TH type.
Please see below for how to use each one.

Learn more

Relationship between chain tensioner displacement and pressing force

  • The main body of the chain tensioner contains two coil springs. The elasticity of these coil springs is used to press the idler sprocket or plastic shoe attached to the tip of the chain, adjusting the slack.
  • Please refer to the formula below for the relationship between the displacement of the idler sprocket or plastic shoe and the pressing force acting at that time, and use it as a guide when installing and adjusting.

Learn more

Structure

Tsubaki chain tensioners consist of a main body and an idler sprocket (the TA type is an integrated type with a plastic shoe).
The tensioner body (made of aluminum) is designed to perform tensioning using the elasticity of the built-in coil spring.


[Click to enlarge]

The idler sprocket section consists of a sprocket with a built-in bearing (an oil-less bush type is also available as an option for the TH type), mounting bolts and washers.
The sprocket teeth are induction hardened, the TCS and ETS types black oxide finish, and the TH type is plated.

Precautions for use

  • - When the chain pulsates, the tensioner rod moves in and out in reaction, sliding against the main body. This accelerates wear on the rod and main body, so please lubricate it during this time.
  • - The tensioner will be severely damaged in a dusty or corrosive environment. Avoid using it in such an environment.
  • - Avoid using the tensioner in cases where thrust force is applied to it, such as in vertical drive, and where severe load fluctuations are applied, such as in forward and reverse operation, as this may cause severe damage to the tensioner.
    ​

variety

1. TCS Type (Oscillating Type) with Idler Sprocket


[Click to enlarge]
Model number Main unit code Applicable
chain		 swing
angle		 Dimensions in mm Pressing force
kN { kgf }		 Estimated
mass
kg		 DXF Drawing
3D CAD data		 Standard price Delivery
B C H M T1 T2 T3 L L1 L2
CT-TCS40 TC-1 RS40-1 45ﾟ 69 86.5 121 M10 15.5 15.5 5 50.5 37.5 6.5 0 {0}
～
0.15 {15}		 0.74 DXF・3DCAD Please contact us Please contact us
CT-TCS50 RS50-1 0.82 DXF・3DCAD Please contact us Please contact us
CT-TCS60 TC-2 RS60-1 30ﾟ 90 100 145 M12 18 18 7 60.5 44.5 8.5 0 {0}
～
0.39 {40}		 1.3 DXF・3DCAD Please contact us Please contact us
CT-TCS80 RS80-1 65.5 47 11 1.52 DXF・3DCAD Please contact us Please contact us
Model number sprocket
Number of teeth: Z		 DP
mm		 DO
mm		 Sprocket mounting bolt Flat washer
Size: O Length
mm		 Strength classification Nominal quantity
CT-TCS40 17 69.12 76 M10 30 10.9 10 2
CT-TCS50 15 76.35 84
CT-TCS60 13 79.60 89 M12 35 10.9 12 2
CT-TCS80 11 90.16 102 4
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2. ETS type direct acting type with idler sprocket


[Click to enlarge]
Model number Main unit code Applicable
chain		 stroke
S
mm		 Dimensions in mm Pressing force
kN { kgf }		 Estimated
mass
kg		 DXF Drawing
3D CAD data		 Standard price Delivery
H H1 F G B N T1 T2 E L L1 L2
CT-ETS40 TO-1 RS40-1 30 129 74 7 58 56.2 11 23 20 12.5 42 29 6.5 0.10 {10}
～
0.25 {25}		 0.6 DXF・3DCAD Please contact us Please contact us
CT-ETS50 RS50-1 0.69 DXF・3DCAD Please contact us Please contact us
CT-ETS60 TO-2 RS60-1 38 163 87 9 70 70.5 12.5 28 25 15 52 36 8.5 0.15 {15}
～
0.39 {40}		 1.15 DXF・3DCAD Please contact us Please contact us
CT-ETS80 RS80-1 57 38.5 11 1.37 DXF・3DCAD Please contact us Please contact us
Model number sprocket
Number of teeth: Z		 DP
mm		 DO
mm		 Sprocket mounting bolt Flat washer
Size: O Length
mm		 Strength classification Nominal quantity
CT-ETS40 17 69.12 76 M10 35 10.9 10 2
CT-ETS50 15 76.35 84
CT-ETS60 13 79.6 89 M12 45 10.9 12 2
CT-ETS80 11 90.16 102 4
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3. TA type direct acting type with plastic shoe


[Click to enlarge]
Model number Main unit code Applicable
chain		 stroke
S
mm		 Dimensions in mm Pressing force
kN { kgf }		 Estimated
mass
kg		 DXF Drawing
3D CAD data		 Standard price Delivery
H H1 F G B N T1 E W R T2
CT-TA40 TO-1 RS40-1
RS08B-1		 30 143 74 7 58 56.2 11 23 12.5 140 120 20 0.10 {10}
～
0.25 {25}		 0.39 DXF・3DCAD Please contact us Please contact us
CT-TA50 TO-2 RS50-1
RS10B-1		 38 164 87 9 70 70.5 12.5 28 15 140 140 22 0.15 {15}
～
0.39 {40}		 0.65 DXF・3DCAD Please contact us Please contact us
CT-TA60 RS60-1
RS12B-1		 DXF・3DCAD Please contact us Please contact us
CT-TA80 TO-3 RS80-1
RS16B-1		 44 187 104 9 86 82 14.5 33 17.5 140 160 25 0.29 {30}
～
0.59 {60}		 0.99 DXF・3DCAD Please contact us Please contact us
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4. TH Type Linear type without idler sprocket

Main unit

Model number stroke
S
mm		 Spring Pressing Force
N		 DXF Drawing
3D CAD data
PDF Drawings		 Standard price Delivery
Minimum Maximum
CT-TH1 25 39.2 117.6 DXF・3DCAD PDF Please contact us Please contact us
CT-TH2 45 98.0 294.0 DXF・3DCAD PDF Please contact us Please contact us

[Click to enlarge]

Adapter (fixing base)

Model number Compatible chain
Tensioner		 DXF Drawing
3D CAD data		 Standard price Delivery
CT-THS1 CT-TH1 DXF・3DCAD Please contact us Please contact us
CT-THS2 CT-TH2 DXF・3DCAD Please contact us Please contact us

[Click to enlarge]
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idler sprocket


[Click to enlarge]
Model number Idler
Number of teeth		 Pitch Circle Diameter
Dp
mm		 Outer diameter
Do
mm		 Maximum
Rotational speed
r/min		 Bearing part
allowable load
N		 DXF Drawing
3D CAD data
PDF Drawings		 Standard price Delivery
ball bearings
specification		 RS35-THB20T 20 60.89 66 3000 3300 DXF・3DCAD PDF Please contact us Please contact us
RS40-THB15T 15 61.08 67 DXF・3DCAD PDF Please contact us Please contact us
RS50-THB15T 15 76.35 84 DXF・3DCAD PDF Please contact us Please contact us
RS60-THB14T 14 85.61 95 DXF・3DCAD PDF Please contact us Please contact us
RS80-THB11T 11 90.16 102 DXF・3DCAD PDF Please contact us Please contact us
Oilless bushing
specification		 RS35-THL20T 20 60.89 66 2500 343 DXF・3DCAD PDF Please contact us Please contact us
RS40-THL15T 15 61.08 67 DXF・3DCAD PDF Please contact us Please contact us
RS50-THL15T 15 76.35 84 DXF・3DCAD PDF Please contact us Please contact us
RS60-THL14T 14 85.61 95 DXF・3DCAD PDF Please contact us Please contact us
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