Aetna V-Belt Idler Pulley A and B Section, 1/2 / 3-1/4
Available
This is the Aetna V-Belt Idler Pulley - 4 Point Heavy Duty, A and B Section, 3-1/4 to 4-13/32" OD.
Aetna 4 point heavy duty V-belt idler pulleys. They are made to give long life under demanding conditions, install on standard 1/2" or 5/8" bolts, and are used as belt tensioners or direction changers. Part number A0150998.
Aetna is a brand of Aetna Bearing Company, based in Livonia, Michigan, USA.
Where this product is used
- Agricultural machinery
- Power transmission equipment
- Conveyor systems
- V-belt drives that need a tensioner or a direction change
Features
- Oversize factory-packed lubricant chamber, so no relubrication is needed
- Case hardened to resist belt abrasion
- Hardened bearing races, with accurately formed outer and inner rings for smooth running
- Self-contouring, free-running, self-wiping seal that keeps positive contact when the pulley is misaligned
- Full ball complement for durability
- Bearing is permanently lubricated and sealed against dirt and grime
- Bore sized to clear standard 1/2" or 5/8" bolts, so it can be fitted to an existing design with little or no change
Key specifications
| Specification | Detail |
|---|---|
| Brand | Aetna |
| Product type | V-Belt Idler Pulley |
| Series | 4 Point Heavy Duty |
| Belt section | A and B |
| Outside diameter range | 3-1/4 to 4-13/32" |
| Nominal bore | 1/2" and 5/8" |
| Model codes | AG2321-A, AG2321, AG2421-A and AG2421 |
| Sizes | 4 |
Available sizes
| Model | SKU | OD, in (mm) | Bore, in | Belt section | Weight |
|---|---|---|---|---|---|
| AG2321-A | A0150998 | 3-1/4 (82.55) | 0.516 to 0.522 | A | 0.78 lb (0.359kg) |
| AG2321 | A0150997 | 3-1/4 (82.55) | 0.643 to 0.649 | A | 0.75 lb (0.340kg) |
| AG2421-A | A0151000 | 4-13/32 (111.918) | 0.516 to 0.522 | B | 1.01 lb (0.458kg) |
| AG2421 | A0150999 | 4-13/32 (111.918) | 0.643 to 0.649 | B | 0.98 lb (0.444kg) |
Fitting and use
Mount the idler on a bolt that matches the bore, or the reduction bush where one is fitted, and clamp through the bush or inner ring only so the pulley rim turns freely on the bearing.
The bearing is sealed and lubricated at the factory. Keep water, grit and solvents away from the seals, and replace the idler if the bearing runs rough or noisy.
Choosing the right option
Match the idler to the belt it runs on (V-belt section), then the outside diameter, the bore or bolt size, and the width the belt needs.
The model codes and dimensions for each size are in the sizes table. If you have the old idler, match its model code or measure the outside diameter, bore and width.
Related idlers: Aetna V-Belt Idler Pulley - 4 Point Heavy Duty, A, B and C Section, 5-3/4" OD, Don Dye V-Belt Idler Pulley - Single Row Bearing, B Section, 3.75 to 6.75" OD, Don Dye V-Belt Idler Pulley - Single Row Bearing, A Section, 2.5 to 4" OD.
| Option | Part number | SKU |
|---|---|---|
| 1/2 / 3-1/4 | A0150998 | |
| 1/2 / 4-13/32 | A0151000 | |
| 5/8 / 3-1/4 | A0150997 | |
| 5/8 / 4-13/32 | A0150999 |
Product details
| Model | AG2321-A |
|---|---|
| Model | AG2321-A |
| Bore (A) | 0.516 to 0.522" (13.106 to 13.258mm) |
| Dimension B | 1-3/16" (30.162mm) |
| Dimension C | 2-1/4" (57.15mm) |
| Outside diameter (D) | 3-1/4" (82.55mm) |
| Dimension F | 7/8" (22.225mm) |
| Dimension G | 0.144" (3.657mm) |
| Dimension H | 0.750" (19.05mm) |
| Belt Section | A |
| Weight | 0.78 lb (0.359kg) |
| Series | 4 Point Heavy Duty |
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Aetna V-Belt Idler Pulley - 4 Point Heavy Duty, A and B Section, 3-1/4 to 4-13/32" OD: 1/2 / 3-1/4
SKU: A0150998 | Model: AG2321-A
Aetna V-belt idler pulley A section, 3-1/4" OD, 1/2" bore, model AG2321-A.