Conveyor & handling parts

What to Measure When Ordering a Replacement Conveyor Roller

Two rollers can have the same tube diameter and still fit different conveyor frames. Identify the lane and roller position first. A straight gravity section, a powered zone and a tapered curve can each use a different roller.

Where to measure

Reference drawings. Verify dimensions on your part or the manufacturer’s drawing.

Tube length, shaft length and roller diameter

Tube length is end face to end face. Shaft length is tip to tip. Measure tube diameter across the cylindrical surface.

Inside frame spacing and axle end

Measure between the inner faces of the conveyor frame. Record axle shape and the size across its flats or outside diameter, as applicable.

Shipping cases and totes on a warehouse roller conveyor

Record lengths separately

Measure or reference the distance between the side frames, the roller tube length and the overall shaft length. Label each dimension and include units. Manufacturers can use different terms for ordering length, so compare your measurements with the drawing for the exact roller series.

Capture the ends and drive

Include the axle diameter and end style, such as a spring-loaded end, hex shaft or threaded end. For a driven roller, note the drive head, sprocket or belt groove arrangement. On a tapered roller, record both end diameters and the direction of the taper.

Add the load and application

Tell the supplier whether the roller carries cases or totes, and share the approximate load and line speed if available. If the original roller has a sleeve or coating, note it. Request the drawing and load rating when considering an alternate.

Manufacturer reference: Interroll conveyor roller catalog