Chain tensioner

Product photo
  • Adjust slackness in the chain to enable continuous and proper chain operation.
  • Excessive chain sag can cause vibration and excessive noise and prevent the chain from properly engaging the sprocket, which prevents the chain from operating smoothly.
  • To eliminate the chain slackness, we provide four types of chain tensioners: TH type, TCS type, ETS type and TA type.
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Catalogs ・Instruction Manuals

Using Chain Tensioners

There are four types of Tsubaki Chain Tensioners: TCS type, ETS type, TA type, and TH type.
Click on each below to learn more about how to use them.

More details

Relationship between chain tensioner displacement and pressing force

  • ・There are two coil springs located inside the chain tensioner body. Using the elasticity of these springs, the idler sprocket or plastic shoe on the end of the tensioner pushes down on the chain, thereby adjusting its slack.
  • ・Click the button below to see the ways to express the relationship between the displacement of the idler sprocket or plastic shoe and the acting pressing force. Use these as a guide for installation and adjustment.

More details

Construction

Tsubaki Chain Tensioners are composed of a main unit and an idler sprocket. (TA type is an integrated model with a plastic shoe. )
The main (aluminum) tensioner unit uses the elasticity of an embedded coil spring for tensioning.


[Click to enlarge ]

The idler sprocket part is made up of a sprocket with embedded bearings (TH type includes the option of an oilless bush), mounting bolts, and washers.
The sprocket teeth have been induction hardened, TCS & ETS types are coated black, and TH type is plated.

Notes for use

  • ・Chain vibration will cause the tensioner rod to move in and out of and slide between the body. This in turn will accelerate rod and tensioner wear. Always lubricate between rod and tensioner body.
  • ・We advise against using chain tensioners in dusty, corrosive, or other extreme environments as this may severely damage the tensioner.
  • ・The tensioner may suffer severe damage when there are additional thrust forces acting on the tensioner (as with a vertical drive) and under severe additional load fluctuations (as with forward-reverse operations). Avoid these where possible.

Types

1. TCS Type Swinging type with idler sprocket


[Click to enlarge ]
Model No. Main unit code Applicable
Chains 		Swing
Angle 		Dimensions 　mm Pressing Force
kN { kgf }		 Estimated Mass
kg		 DXF drawings
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 Contact us for details. Contact us for details.
CT-TCS50 RS50-1 0.82 DXF・3DCAD Contact us for details. Contact us for details.
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 Contact us for details. Contact us for details.
CT-TCS80 RS80-1 65.5 47 11 1.52 DXF・3DCAD Contact us for details. Contact us for details.
Model No. No. of Sprocket Teeth ：Z DP
mm		 DO
mm		 Sprocket Mounting Bolt Flat washers
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 Linear type with idler sprocket


[Click to enlarge ]
Model No. Main unit code Applicable
Chains 		Stroke
S
mm		 Dimensions 　mm Pressing Force
kN { kgf }		 Estimated Mass
kg		 DXF drawings
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 Contact us for details. Contact us for details.
CT-ETS50 RS50-1 0.69 DXF・3DCAD Contact us for details. Contact us for details.
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 Contact us for details. Contact us for details.
CT-ETS80 RS80-1 57 38.5 11 1.37 DXF・3DCAD Contact us for details. Contact us for details.
Model No. No. of Sprocket Teeth ：Z DP
mm		 DO
mm		 Sprocket Mounting Bolt Flat washers
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 Linear type with plastic shoe


[Click to enlarge ]
Model No. Main unit code Applicable
Chains 		Stroke
S
mm		 Dimensions 　mm Pressing Force
kN { kgf }		 Estimated Mass
kg		 DXF drawings
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 Contact us for details. Contact us for details.
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 Contact us for details. Contact us for details.
CT-TA60 RS60-1
RS12B-1		 DXF・3DCAD Contact us for details. Contact us for details.
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 Contact us for details. Contact us for details.
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4. TH Type Linear type without idler sprocket

Main unit

Model No. Stroke
S
mm		 Spring Pressing Force
N		 DXF drawings
3D CAD data
PDFDrawings 		Standard Price Delivery
Minimum Maximum
CT-TH1 25 39.2 117.6 DXF・3DCAD PDF Contact us for details. Contact us for details.
CT-TH2 45 98.0 294.0 DXF・3DCAD PDF Contact us for details. Contact us for details.

[Click to enlarge ]

Adapter (base for attachment)

Model No. Applicable Chain
Tensioner 		DXF drawings
3D CAD data 		Standard Price Delivery
CT-THS1 CT-TH1 DXF・3DCAD Contact us for details. Contact us for details.
CT-THS2 CT-TH2 DXF・3DCAD Contact us for details. Contact us for details.

[Click to enlarge ]
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Idler Sprocket


[Click to enlarge ]
Model No. No. of Idler Teeth Pitch Diameter
Dp
mm		 Outer Diameter
Do
mm		 Max. Rotation Speed
r/min		 Allowable Bearing Load
N		 DXF drawings
3D CAD data
PDFDrawings 		Standard Price Delivery
Ball Bearing
Series 		RS35-THB20T 20 60.89 66 3000 3300 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS40-THB15T 15 61.08 67 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS50-THB15T 15 76.35 84 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS60-THB14T 14 85.61 95 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS80-THB11T 11 90.16 102 DXF・3DCAD PDF Contact us for details. Contact us for details.
Lube-free Bush
Series 		RS35-THL20T 20 60.89 66 2500 343 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS40-THL15T 15 61.08 67 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS50-THL15T 15 76.35 84 DXF・3DCAD PDF Contact us for details. Contact us for details.
RS60-THL14T 14 85.61 95 DXF・3DCAD PDF Contact us for details. Contact us for details.
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