Aetna V-Belt Idler Pulley A Section 3-1/4" OD x 1/2" Bore - AG2321-A

Aetna V-Belt Idler Pulley - 4 Point Heavy Duty, A and B Section, 3-1/4 to 4-13/32" OD: 4 sizes in this listing (AG2321-A, AG2321, AG2421-A and AG2421), 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 in or 5/8 in bolts, and are used as belt tensioners or direction changers.

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 in or 5/8 in bolts, so it can be fitted to an existing design with little or no change
• Aetna V-belt idler pulleys from AIMS Industrial, Sydney, with Australia-wide delivery

Key specifications

Available sizes

Model codes are the supplier's part numbers; the SKU is the AIMS part number. Dimensions are in inches with millimetres in brackets, as published in the supplier's catalogue.

Selecting 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.

Dimension letters (A, B, C and so on) follow the Aetna catalogue drawing. Where the drawing does not name a letter as a standard dimension, the table lists it as Dimension B, C and so on.

If the size you need is not listed, send AIMS the outside diameter, bore and belt type and we will check what is available.

The catalogue page for this product, with its dimension drawing, can be downloaded from the Catalogue section of this page. Dimensions are as published in the supplier's catalogue.

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.

Line the idler up with the belt path, keep the running face clean and free of burrs, and set belt tension to the drive manufacturer's figure.

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.

Related products

Related idlers: Aetna V-Belt Idler Pulley - 4 Point Heavy Duty, A, B and C Section, 5-3/4" OD, Aetna V-Belt Idler Pulley, B and C Section 7" OD x 5/8" Bore - AG2721, 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 and Aetna V-Belt Idler Pulley - Single Row Bearing, B Section, 4-3/8" OD. See the full range in Idler Pulleys.