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 | ||
Vertical Mount | |||||||||||||
| 3/8"-16 | 45 | 5" | 3 1/2" | 5" | ±45° | 2 7/8" | Steel | 180° | Idler Shaft, Internal Spring | 000000000 | 0000000 | 00000000 | 000000 |
| 1/2"-13 | 45 | 5" | 3 1/2" | 5" | ±45° | 2 7/8" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
| 5/8"-11 | 45 | 5" | 3 1/2" | 5" | ±45° | 2 7/8" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
| 3/4"-10 | 45 | 5" | 3 1/2" | 5" | ±45° | 2 7/8" | Steel | 180° | Idler Shaft, Internal Spring | 00000000 | 000000 | 00000000 | 00000 |
Horizontal Mount | |||||||||||||
| 3/8"-16 | 45 | 3 1/8" | 4" | 5" | ±45° | 2 1/2" | Steel | 180° | Idler Shaft, Internal Spring | 000000000 | 000000 | 00000000 | 00000 |
| 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 |
Heavy Duty Spring-Loaded Adjustable-Arm Belt and Roller Chain Tensioners
Maintain correct drive tension to ensure smooth operation for maximum power and a long service life. Designed for use on large belt and chain drives, tensioners are spring loaded to provide constant tension and automatic adjustments for pulsating loads. Adjust the arm to control tension in a 360° arc. Idler shaft (sold separately) is required.
For technical drawings and 3-D models, click on a part number.
Overall | Thread | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Lg. | Dia. | Size | Lg. | Edge Type | Fabrication | Hardness Rating | Hardness | Includes | Each | |
Inch with Shaft Collar—1215 Carbon Steel | ||||||||||||
| 1" | 1 1/2" | 3 3/8" | 1 1/2" | 3/4"-16 | 7/8" | Chamfered | Hardened | Very Hard | Rockwell C58 | Grease Fitting | 000000 | 000000 |
| 1" | 2 1/2" | 4 3/8" | 1 1/2" | 3/4"-16 | 7/8" | Chamfered | Hardened | Very Hard | Rockwell C58 | Grease Fitting | 000000 | 00000 |
| 1" | 3 1/2" | 5 3/8" | 1 1/2" | 3/4"-16 | 7/8" | Chamfered | Hardened | Very Hard | Rockwell C58 | Grease Fitting | 000000 | 00000 |
Heavy Duty Spring-Loaded Belt and Roller Chain Tensioners
with Idler Shaft
(Sold Separately)
Designed for large belt and chain drives, these tensioners maintain correct drive tension for smooth operation, maximum power, and a long service life. They're spring loaded, which keeps constant tension on a belt or chain and automatically adjusts for changes in loads. An idler shaft (sold separately) is required.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting Plate | Mounting Holes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tension Force, lbs. | For Idler ID | Travel Ht. | Ht. | Dp. | Wd. | Ht. | Material | No. of | Lg. | Mounting Fasteners Included | Each | |
| 84 | 1 1/2" | 3" | 18 5/16" | 3 3/16" | 6" | 7" | Cast Iron | 4 | 1 7/8" | Yes | 0000000 | 0000000 |
with Idler Shaft
(Sold Separately)
Overall | Thread | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia. | Lg. | Lg. | Dia. | Size | Lg. | Edge Type | Fabrication | Hardness Rating | Hardness | Includes | Each | |
Inch with Shaft Collar—1215 Carbon Steel | ||||||||||||
| 1 1/2" | 3 1/4" | 5 11/16" | 2 1/4" | 1"-14 | 1 5/16" | Chamfered | Hardened | Very Hard | Rockwell C58 | Grease Fitting | 00000000 | 000000 |
| 1 1/2" | 5 1/4" | 7 11/16" | 2 1/4" | 1"-14 | 1 5/16" | Chamfered | Hardened | Very Hard | Rockwell C58 | Grease Fitting | 00000000 | 00000 |
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 |
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 |
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 |
Constant-Tension V-Belt Pulleys
A built-in spring maintains tension on your belt.
For technical drawings and 3-D models, click on a part number.
Keyway | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | For Shaft Dia. | Pitch Dia. | Wd. | O'all Wd. | Wd. | Dp. | Material | Body Type | Includes | Each | |
For 4L, 5L, A, AX, B, BX Belts | |||||||||||
| 3.25" | 1/2" | 1.91"-3.15" | 11/16" | 2 3/8" | __ | __ | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 3.25" | 5/8" | 1.91"-3.15" | 11/16" | 2 3/8" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 00000 |
| 3.25" | 3/4" | 1.91"-3.15" | 11/16" | 2 3/8" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 00000 |
| 4" | 1/2" | 1.95"-3.9" | 11/16" | 2 7/16" | __ | __ | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 4" | 5/8" | 1.95"-3.9" | 11/16" | 2 7/16" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 4" | 3/4" | 1.95"-3.9" | 11/16" | 2 7/16" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 5" | 5/8" | 2.37"-4.84" | 15/16" | 3 5/8" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 5" | 3/4" | 2.37"-4.84" | 15/16" | 3 5/8" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 5" | 7/8" | 2.37"-4.84" | 15/16" | 3 5/8" | 3/16" | 3/32" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
| 5" | 1" | 2.37"-4.84" | 15/16" | 3 5/8" | 1/4" | 1/8" | Cast Iron | Solid | One Set Screw | 0000000 | 000000 |
Spring Installation and Removal Tools
Steel jaws hook onto compression or die springs to facilitate installation and removal.
| For Spring Type | Overall Lg. | Jaw Material | Pair | |
| Compression, Die | 12 1/4" | Steel | 0000000 | 000000 |
Brake Spring Pliers
Use the tips of these pliers to stretch your brake spring. The handle ends remove and install a spring from an anchor post.
Jaw | |||||||
|---|---|---|---|---|---|---|---|
| Overall Lg. | Max. Capacity | Lg. | Texture | Material | With Wire Cutter | Each | |
Curved Jaws and Plain Grip | |||||||
| 12 7/8" | 5 3/4" | 3 3/4" | Smooth | Steel | No | 0000000 | 000000 |