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Conveyor Belt Tensioners
A tensioner extends or retracts the conveyor pulley to adjust the tension on the conveyor belt. Mount to the sides of the conveyor and attach to the bearings that hold the pulley.
Stainless steel tensioners are corrosion resistant.
Note: Two tensioners and two bearings (sold separately) are required.
For technical drawings and 3-D models, click on a part number.
Tensioners
Steel
Stainless Steel
A tensioner extends or retracts the conveyor pulley to adjust the tension on the conveyor belt.
Mounting Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Max. Adjustment Lg. | Lg. | Ht. | Adjusting Screw Material | Mounting Fasteners Included | Dia. | Ctr.-to-Ctr. Lg. | Ctr.-to-Ctr. Ht. | Color | Each | |
Painted Steel | ||||||||||
| 1 1/2" | 7" | 4 1/16" | Cadmium-Plated Steel | No | 9/16" | 6" | 3 3/16" | Gray | 0000000 | 0000000 |
| 3" | 8 1/2" | 4 1/16" | Cadmium-Plated Steel | No | 9/16" | 7 1/2" | 3 3/16" | Gray | 0000000 | 000000 |
| 6" | 11 1/2" | 4 1/16" | Cadmium-Plated Steel | No | 9/16" | 10 1/2" | 3 3/16" | Gray | 0000000 | 000000 |
| 6" | 12 3/8" | 4 11/16" | Cadmium-Plated Steel | No | 9/16" | 11 3/8" | 3 11/16" | Gray | 0000000 | 000000 |
| 6" | 14" | 5 1/16" | Cadmium-Plated Steel | No | 9/16" | 12 7/8" | 3 1/16" | Gray | 0000000 | 000000 |
| 9" | 14 1/2" | 4 1/16" | Cadmium-Plated Steel | No | 9/16" | 13 1/2" | 3 3/16" | Gray | 0000000 | 000000 |
| 9" | 15 3/8" | 4 11/16" | Cadmium-Plated Steel | No | 9/16" | 14 3/8" | 3 11/16" | Gray | 0000000 | 000000 |
| 9" | 17" | 5 1/16" | Cadmium-Plated Steel | No | 9/16" | 15 7/8" | 3 1/16" | Gray | 0000000 | 000000 |
| 12" | 18 3/8" | 4 11/16" | Cadmium-Plated Steel | No | 9/16" | 17 3/8" | 3 11/16" | Gray | 0000000 | 000000 |
| 12" | 20" | 5 1/16" | Cadmium-Plated Steel | No | 9/16" | 18 7/8" | 3 1/16" | Gray | 0000000 | 000000 |
| 18" | 26" | 5 1/16" | Cadmium-Plated Steel | No | 9/16" | 24 7/8" | 3 1/16" | Gray | 0000000 | 000000 |
Stainless Steel  | ||||||||||
| 3" | 8" | 3 3/4" | Stainless Steel | No | 3/8" | 6 1/2" | 1 3/4" | __ | 0000000 | 000000 |
| 6" | 11" | 3 3/4" | Stainless Steel | No | 3/8" | 9 1/2" | 1 3/4" | __ | 0000000 | 000000 |
| 9" | 14" | 3 3/4" | Stainless Steel | No | 3/8" | 12 1/2" | 1 3/4" | __ | 0000000 | 000000 |
| 12" | 17" | 3 3/4" | Stainless Steel | No | 3/8" | 15 1/2" | 1 3/4" | __ | 0000000 | 000000 |
Bearings
Iron
Stainless Steel
End View
| For Tensioner Height | For Shaft Dia. | Dynamic Load Cap., lbs. | Max. Speed, rpm | Lg. | Wd. | Ht. | Temp. Range, °F | Features | Each | |
Iron | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 4 1/16" | 1/2" | 2,100 | 7,500 | 3 11/16" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 0000000 |
| 4 1/16" | 5/8" | 2,100 | 7,500 | 3 11/16" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 4 1/16" | 3/4" | 2,610 | 6,500 | 4" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 4 1/16" | 1" | 2,800 | 5,500 | 4 3/32" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 4 11/16" | 1 3/16" | 4,380 | 4,500 | 4 5/8" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 4 11/16" | 1 1/4" | 5,780 | 4,000 | 5" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 4 11/16" | 1 7/16" | 5,780 | 4,000 | 5" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 5 1/16" | 1 1/2" | 7,340 | 3,500 | 5 19/32" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 5 1/16" | 1 3/4" | 7,900 | 3,000 | 5 3/4" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 5 1/16" | 1 15/16" | 7,880 | 3,000 | 5 29/32" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
Stainless Steel with Plastic Housing | ||||||||||
| 3 3/4" | 5/8" | 2,435 | 4,835 | 3 11/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 3 3/4" | 3/4" | 2,435 | 4,835 | 3 11/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 3 3/4" | 7/8" | 2,650 | 4,610 | 3 13/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 3 3/4" | 1" | 2,650 | 4,610 | 3 13/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
Bearings for Conveyor Belt Tensioners
Iron
Stainless Steel
End View
Use on a conveyor pulley with a conveyor belt tensioner to adjust the tension on a conveyor belt.
Stainless steel bearings are corrosion resistant.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | Dynamic Load Cap., lbs. | Max. Speed, rpm | Lg. | Wd. | Ht. | Temp. Range, °F | Features | Each | |
Iron | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 2,100 | 7,500 | 3 11/16" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 0000000 |
| 5/8" | 2,100 | 7,500 | 3 11/16" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 3/4" | 2,610 | 6,500 | 4" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1" | 2,800 | 5,500 | 4 3/32" | 17/32" | 3 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 3/16" | 4,380 | 4,500 | 4 5/8" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 1/4" | 5,780 | 4,000 | 5" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 7/16" | 5,780 | 4,000 | 5" | 17/32" | 4" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 1/2" | 7,340 | 3,500 | 5 19/32" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 3/4" | 7,900 | 3,000 | 5 3/4" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1 15/16" | 7,880 | 3,000 | 5 29/32" | 11/16" | 4 1/2" | -20° to 200° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
Stainless Steel with Plastic Housing | |||||||||
| 5/8" | 2,435 | 4,835 | 3 11/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 3/4" | 2,435 | 4,835 | 3 11/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 7/8" | 2,650 | 4,610 | 3 13/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
| 1" | 2,650 | 4,610 | 3 13/16" | 17/64" | 3 1/8" | 0° to 150° | Grease Fitting, Locking Collar with Two Set Screws | 0000000 | 000000 |
Enclosed Conveyor Belt Tensioners
Prevent debris buildup, and thread damage—these tensioners have a totally enclosed adjusting screw. Tensioners mount to the sides of the conveyor and attach to the bearings that hold the pulley. Note: Two tensioners and two base-mount bearings (not included) are required.
Stainless steel tensioners are corrosion resistant.
For technical drawings and 3-D models, click on a part number.
Mounting Hole | Mounting Slot | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Adjustment Lg. | Lg. | Ht. | Adjusting Screw Material | Mounting Fasteners Included | Dia. | Ctr.-to-Ctr. Lg. | Ctr.-to-Ctr. Ht. | Wd. | Ht. | Ctr.-to-Ctr. Ht. | Each | |
Steel | ||||||||||||
| 3" | 6 7/8" | 5 1/4" | Steel | No | 9/16" | 3 9/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 0000000 |
| 3" | 8 1/2" | 7" | Steel | No | 9/16" | 4 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
| 6" | 10 3/8" | 5 1/4" | Steel | No | 9/16" | 7 1/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 000000 |
| 6" | 11 1/2" | 7" | Steel | No | 9/16" | 7 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
| 9" | 14 3/8" | 5 1/4" | Steel | No | 9/16" | 11 1/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 000000 |
| 9" | 14 1/2" | 7" | Steel | No | 9/16" | 10 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
| 12" | 19 1/8" | 10" | Steel | No | 11/16" | 14 1/8" | 4" | 11/16" | 1 9/16" | 5 9/16"-8 11/16" | 00000000 | 000000 |
Stainless Steel | ||||||||||||
| 3" | 6 7/8" | 5 1/4" | Stainless Steel | No | 9/16" | 3 9/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 000000 |
| 3" | 8 1/2" | 7" | Stainless Steel | No | 9/16" | 4 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
| 6" | 10 3/8" | 5 1/4" | Stainless Steel | No | 9/16" | 7 1/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 000000 |
| 6" | 11 1/2" | 7" | Stainless Steel | No | 9/16" | 7 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
| 9" | 14 3/8" | 5 1/4" | Stainless Steel | No | 9/16" | 11 1/16" | 2 5/8" | 7/16" | 11/16" | 2 15/16"-4 5/16" | 00000000 | 000000 |
| 9" | 14 1/2" | 7" | Stainless Steel | No | 9/16" | 10 3/8" | 3" | 9/16" | 15/16" | 3 13/16"-5 11/16" | 00000000 | 000000 |
Heavy Duty Spring-Loaded Belt and Roller Chain Tensioners
Tensioner Shown 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.
Tensioners
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 |
Idler Shafts
Tensioner Shown 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 |
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.
Idler Shafts
Tensioner Shown 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 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 |
Spring-Loaded Adjustable-Arm Roller Chain and Belt Tensioners
Vertical Mount
Horizontal Mount
Replacement Spring
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 |
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 |
Adjustable-Arm Roller Chain and Belt Tensioners
Vertical Mount
Horizontal Mount Shown with Sprocket (Not Included)
Mounting Plate | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Ht. | Wd. | Tension Arm Lg. | Overall Dp. | Material | Arm Rotation | Includes | Each | |
Vertical Mount | |||||||||
| 3/8"-16 | 3 1/4" | 2" | 2 1/2" | 1 3/8" | Steel | 360° | Idler Shaft | 00000000 | 0000000 |
| 1/2"-13 | 5" | 3 1/2" | 3 13/16" | 2" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 5/8"-11 | 5" | 3 1/2" | 3 13/16" | 2" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 3/4"-10 | 5" | 3 1/2" | 3 13/16" | 2" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
Horizontal Mount | |||||||||
| 3/8"-16 | 2 5/16" | 2 1/4" | 2 1/2" | 2" | Steel | 360° | Idler Shaft | 00000000 | 000000 |
| 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 |