How to Replace a Conveyor Feed Belt on a JET SuperMax 25x2
By Red Label Abrasives | Published: 2026-11-02
Category: How-to Guides
Step-by-step instructions for swapping the conveyor feed belt on a JET SuperMax 25x2 drum sander, including tensioning and tracking checks.
Quick answer
To replace the conveyor feed belt on a JET SuperMax 25x2, first disconnect power and lower the drum, then loosen the conveyor tension and remove the old belt. Install the new 23 x 67 1/2 inch conveyor sanding belt with the joint centered, retension, and track it by running the conveyor slowly and adjusting the tracking screws until the belt stays centered.
Why the belt joint and size matter on the SuperMax 25x2
The SuperMax 25x2 uses a 23-inch-wide by 67 1/2-inch-long conveyor feed belt. A belt that is too long or too short will not tension correctly and can slip or stall under load. The joint is the most stressed part of any feed belt; a weak or bumpy joint can cause tracking problems and marks on your workpiece. Choose a belt with a strong, flat joint to avoid frequent adjustments.
When to replace rather than re-tension
If the belt slips even after proper tensioning, or if you see frayed edges, a stretched joint, or a glazed surface that no longer grips, replacement is the better fix. Re-tensioning helps only when the belt is in good condition but has loosened slightly. Inspect the belt regularly and replace it before it fails mid-project.
Step-by-step feed belt replacement
- Disconnect power and lower the drum: Unplug the sander and lower the drum so it does not contact the conveyor belt during the swap. Mistake to avoid: skipping this step can cause damage to the drum or belt if the machine is accidentally started. Always lock out power before beginning.
- Loosen the conveyor belt tension: Locate the tension adjustment screws on the conveyor frame and turn them to release tension on the old belt. Checkpoint: the belt should move freely by hand once tension is released.
- Remove the old belt: Slide the old belt off the conveyor rollers, noting its orientation and the position of the joint. Mistake to avoid: forcing a stuck belt can bend the rollers or damage the frame.
- Install the new 23 x 67 1/2 inch belt: Slide the new belt onto the rollers with the joint centered and facing the same direction as the old belt. Checkpoint: the belt should sit flat without twists.
- Retension the belt: Tighten the tension screws evenly until the belt is snug but not overly tight. Mistake to avoid: over-tensioning can stretch the belt or damage bearings; follow the sander manual for the correct deflection. Adjust both sides equally to keep the belt centered.
- Track the belt: Run the conveyor at slow speed and watch the belt’s position on the rollers. Adjust the tracking screws in small increments until the belt stays centered. Checkpoint: the belt should not drift to either side after several revolutions. Recheck tracking after running a test piece.
Product facts
- 23 X 67 1/2 Inch Replacement Conveyor Sanding Feed Belt (JET Performax SuperMax 25x2): This replacement conveyor sanding feed belt is sized 23 x 67 1/2 inches and made with aluminum oxide abrasive on a cloth backing. The size matches the SuperMax 25x2, and the aluminum oxide grain provides reliable grip for feeding workpieces.
23 X 67 1/2 Inch Replacement Conveyor Sanding Feed Belt (JET Performax SuperMax 25x2) - 23 X 67 1/2 Inch Replacement Conveyor Sanding Feed Belt (JET Performax SuperMax 25x2): The belt features an ultra-strong bi-directional no-bump tape joint that is guaranteed not to stretch or break. A flat, durable joint reduces tracking issues and extends belt life under tension.
