Spring-Loaded Adjustable-Arm Roller Chain and Belt Tensioners
Tensioners take up slack and allow you to adjust tension on your roller chain or belt. A built-in spring allows the adjustment arm to apply continuous tension. They are for use with idler sprockets or pulleys.
For technical drawings and 3-D models, click on a part number.
Tensioners | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mounting Plate | Replacement Springs | ||||||||||||
| Thread Size  | Tension Force, lbs. | Ht. | Wd. | Tension Arm Lg. | Deflection Angle | Overall Dp. | Material | Arm Rotation | Includes | Each | Each | ||
Horizontal Mount | |||||||||||||
| 3/8"-16 | 45 | 3 1/8" | 4" | 5" | ±45° | 2 1/2" | Steel | 180° | Idler Shaft, Internal Spring | 000000000 | 0000000 | 00000000 | 000000 |
| 1/2"-13 | 45 | 3 1/8" | 4" | 5" | ±45° | 2 1/2" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
| 5/8"-11 | 45 | 3 1/8" | 4" | 5" | ±45° | 2 1/2" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
| 3/4"-10 | 45 | 3 1/8" | 4" | 5" | ±45° | 2 1/2" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
Adjustable-Arm Roller Chain and Belt Tensioners
Mounting Plate | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Ht. | Wd. | Tension Arm Lg. | Overall Dp. | Material | Arm Rotation | Includes | Each | |
Horizontal Mount | |||||||||
| 3/8"-16 | 2 5/16" | 2 1/4" | 2 1/2" | 2" | Steel | 360° | Idler Shaft | 00000000 | 0000000 |
| 1/2"-13 | 3 1/4" | 4" | 3 13/16" | 3 3/8" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 5/8"-11 | 3 1/4" | 4" | 3 13/16" | 3 3/8" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 3/4"-10 | 3 1/8" | 4" | 4" | 3 3/8" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 1"-14 | 7 3/8" | 7 1/2" | 6 1/2" | 11 1/4" | Cast Iron | 360° | Idler Shaft | 000000000 | 000000 |
Adjustable-Screw Roller Chain and Belt Tensioners
Tensioners take up slack and allow you to adjust tension on your roller chain or belt. Precisely apply tension in a straight line by moving the adjustment screw. They are for use with idler sprockets or pulleys.
For technical drawings and 3-D models, click on a part number.
Mounting Plate | |||||||
|---|---|---|---|---|---|---|---|
| For Idler ID | Ht. | Wd. | Overall Dp. | Material | Includes | Each | |
Vertical/Horizontal Mount | |||||||
| 1/4" | 5 7/8" | 1 1/2" | 3 1/8" | Steel | Idler Shaft | 00000000 | 0000000 |
| 3/8" | 5 7/8" | 1 1/2" | 3 1/8" | Steel | Idler Shaft | 00000000 | 000000 |
| 1/2" | 5 7/8" | 1 1/2" | 3 1/8" | Steel | Idler Shaft | 000000 | 000000 |
| 5/8" | 9" | 2" | 4 5/16" | Steel | Idler Shaft | 00000000 | 000000 |
| 3/4" | 9" | 2" | 4 5/16" | Steel | Idler Shaft | 00000000 | 000000 |
| 7/8" | 9" | 2" | 4 5/16" | Steel | Idler Shaft | 000000 | 000000 |
| 1 1/8" | 13" | 3" | 6" | Steel | Idler Shaft | 000000 | 000000 |
Channel-Guided Roller Chain Tensioners
Built-in springs put constant tension on roller chain to absorb and buffer shock, reduce vibration, and improve drive performance.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Roller Chain Trade Size | Tension Force, lbs. | Travel Ht. | Ht. | Wd. | Dp. | Material | Housing Material | Dia. | No. of | Mounting Fasteners Included | Max. Temperature, ° F | Each | |
For Single-Strand ANSI Roller Chain | |||||||||||||
Vertical/Horizontal Mount | |||||||||||||
| 35 | 15-40 | 1.05" | 5 15/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 0000000 |
| 35 | 15-40 | 1.05" | 5 19/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
| 40 | 15-40 | 1.05" | 5 15/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
| 40 | 15-40 | 1.05" | 5 19/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
| 50 | 20-60 | 1.2" | 6 13/32" | 2 15/16" | 1 3/16" | Plastic | Aluminum | 7/16" | 1 | No | 180° | 0000000 | 000000 |
| 50 | 20-60 | 1.2" | 6 15/32" | 2 15/16" | 1 3/16" | Plastic | Aluminum | 7/16" | 1 | No | 180° | 0000000 | 000000 |
| 60 | 20-60 | 1.2" | 6 13/32" | 2 15/16" | 1 3/16" | Plastic | Aluminum | 7/16" | 1 | No | 180° | 0000000 | 000000 |
| 60 | 20-60 | 1.2" | 6 15/32" | 2 15/16" | 1 3/16" | Plastic | Aluminum | 7/16" | 1 | No | 180° | 0000000 | 000000 |
| 80 | 45-100 | 1.5" | 7 1/2" | 3 17/32" | 1 3/8" | Plastic | Aluminum | 1/2" | 1 | No | 180° | 0000000 | 000000 |
| 80 | 45-100 | 1.5" | 7 25/32" | 3 17/32" | 1 3/8" | Plastic | Aluminum | 1/2" | 1 | No | 180° | 0000000 | 000000 |
| 100 | 45-100 | 1.5" | 7 1/2" | 3 17/32" | 1 3/8" | Plastic | Aluminum | 1/2" | 1 | No | 180° | 0000000 | 000000 |
| 100 | 45-100 | 1.5" | 7 25/32" | 3 17/32" | 1 3/8" | Plastic | Aluminum | 1/2" | 1 | No | 180° | 0000000 | 000000 |
For Double-Strand ANSI Roller Chain | |||||||||||||
Vertical/Horizontal Mount | |||||||||||||
| 40 | 15-40 | 1.05" | 5 15/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
| 40 | 15-40 | 1.05" | 5 19/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
| 60 | 20-60 | 1.2" | 6 15/32" | 2 15/16" | 1 3/16" | Plastic | Aluminum | 7/16" | 1 | No | 180° | 0000000 | 000000 |
For Single-Strand ISO Roller Chain | |||||||||||||
Vertical/Horizontal Mount | |||||||||||||
| 06B | 5-30 | 1.05" | 5 19/32" | 2 5/16" | 1" | Plastic | Aluminum | 3/8" | 1 | No | 180° | 0000000 | 000000 |
Low-Profile Channel-Guided Roller Chain Tensioners
At less than 4" in height, these tensioners are good for use on low-clearance drives. Built-in springs put constant tension on roller chain to absorb and buffer shock, reduce vibration, and improve drive performance.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Roller Chain Trade Size | Tension Force, lbs. | Travel Ht. | Ht. | Wd. | Dp. | Material | Housing Material | Dia., mm | No. of | Mounting Fasteners Included | Max. Temperature, ° F | Each | |
For Single-Strand ANSI Roller Chain | |||||||||||||
Vertical/Horizontal Mount | |||||||||||||
| 25, 35 | 7-13 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 0000000 |
| 25, 35 | 13-29 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 40 | 7-13 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 40 | 13-29 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 50 | 7-13 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 50 | 13-29 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 60 | 7-13 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
| 60 | 13-29 | 1.6" | 3 25/32" | 2 25/32" | 1 1/4" | Plastic | Steel | 6 | 2 | No | 140° | 000000 | 000000 |
Ultra-Low-Profile Channel-Guided Roller Chain Tensioners
Able to fit in tight spots, these tensioners are less than 3" tall. Built-in springs put constant tension on roller chain to absorb and buffer shock, reduce vibration, and improve drive performance.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Roller Chain Trade Size | Tension Force, lbs. | Travel Ht. | Ht. | Wd. | Dp. | Material | Housing Material | Dia., mm | No. of | Mounting Fasteners Included | Max. Temperature, ° F | Each | |
For Single-Strand ANSI Roller Chain | |||||||||||||
Vertical/Horizontal Mount | |||||||||||||
| 35 | 2-4 | 0.6" | 2 9/16" | 2" | 19/32" | Plastic | 304 Stainless Steel | 5 | 2 | No | 140° | 000000 | 0000000 |
| 35 | 13-19 | 0.6" | 2 9/16" | 2" | 19/32" | Plastic | 304 Stainless Steel | 5 | 2 | No | 140° | 0000000 | 000000 |