03G-3 A500359 Chain Shaft Guide Bushing for MX48 Power Feeder OD23mm ID17mm Bottom OD42mm H23mm 64.2g

A worn guide bushing shows up as a chain shaft that no longer runs true: the panel walks, the edge chatters and one flank of the chain wears first. The 03G-3 A500359 chain shaft guide bushing is the listed replacement for that wear point on the MX48 power feeder drive. OD 23 mm into the housing, ID 17 mm on the shaft, bottom OD 42 mm for axial location, 23 mm overall height, 64.2 g of wear-resistant metal. Measure those four sizes off the old part before you order.

A chain-drive feeder that starts walking the panel, then chatters along the edge, usually has a worn guide in the drive train, not a motor fault. Three things arrive together: a chain shaft that is no longer held concentric, a chain pulled out of line onto one flank of the sprocket, and a hunt for the bush that wore out.

The 03G-3 A500359 chain shaft guide bushing is the wear part that carries and centres the chain shaft inside the MX48 power feeder drive. It is a plain stepped bushing, not a rolling bearing: OD 23 mm locates in the housing bore, ID 17 mm runs on the shaft, the 42 mm bottom flange sets axial position and the 23 mm height fixes how deep the sleeve sits.

The body is wear-resistant metal, so the sliding pair is bushing against shaft, not steel against a cast bore. That holds friction down, damps vibration and keeps the shaft concentric, so the chain runs in one plane: the bushing is the wear surface, and the shaft keeps its size.

At 64.2 g it handles easily at the machine and stores as a shelf spare. One number, 03G-3 A500359, covers the part on the MX48 wheel station, so repeat orders need no photo. Price is quoted on request: send 23 / 17 / 42 / 23 mm with the enquiry.

Each line below is a property you can confirm with a caliper on the part itself.

• Stepped bushing, not a caged bearing — one machined body carries the shaft and sets the flange seat, so no separate collar or lock ring is needed.
• 23 mm housing diameter — the OD that locates in the feeder housing bore and moves most once the old bush wears oval.
• 17 mm shaft bore — the sliding surface itself; measure the worn shaft here first, because an oval bore is what starts the drift along the edge.
• 42 mm bottom flange — the step that stops the bushing at the housing face and keeps the shaft square to the chain run.
• 23 mm overall height — flange face to top face, so the drive train stack height returns to what it was.
• 64.2 g net weight — light enough to post as one spare and to fit one-handed at the machine.
• Wear-resistant metal body — the bushing takes the sliding wear, so the shaft and the housing bore keep their original size.
• Chain held in one plane — shaft-to-sprocket alignment is set by the bore and the flange seat, not by how tight the chain happens to be.
• Listed for MX48 power feeders — the same number is catalogued as a power feeder MX48 accessory, so the number alone identifies the part.

The usual choice is between living with a feed that drifts and buying a whole transmission assembly. This bushing is the third option.

• Replace only what wore out. The bushing is the 64.2 g wear item in the drive, so a chain shaft, a sprocket and a housing that are still within size stay on the machine.
• Four numbers settle the fit. 23 / 17 / 42 / 23 mm cover bore, shaft, axial stop and stack height, so nothing about the fit has to be taken on trust from a picture.
• Order by number, not by picture. 03G-3 A500359 is the whole identity of the part, which is what makes repeat orders and shelf stock simple.
• Wear lands on the small part. As the sacrificial surface the bushing protects the shaft and the housing bore, so the next repair is the same 64.2 g bush and not a new drive assembly.
• A round bore keeps the feed straight. With a concentric 17 mm bore and a flat 42 mm seat the shaft stays square, the chain runs in one plane and the feed rate along the edge stops drifting.
• One spare on the shelf removes the wait. At 64.2 g and 23 mm high a spare takes almost no shelf space and covers the wear that stops a feeder in the middle of a job.

Match four readings to the old part and it fits: OD 23 mm, ID 17 mm, bottom OD 42 mm, height 23 mm. Those four cover the housing bore, the shaft, the axial stop and the stack height, so if they agree, the part number agrees as well.

It is a plain stepped bushing, not a rolling bearing. There are no balls or rollers: the shaft slides directly in the 17 mm bore of a wear-resistant metal body, and the 42 mm flange stops the part at the housing face.

Quote 03G-3 A500359 together with the four sizes. The number identifies the bushing on its own, and the sizes are what let it be checked against your feeder before it is packed.

MX48 is the only application listed for this number. Because of that, confirm the fit with 23 / 17 / 42 / 23 mm rather than with the feeder model name alone.

Because a worn bore lets the chain shaft sit off centre. The shaft then runs out of true, the chain is pulled to one side and the feed rate along the edge becomes uneven; a new 17 mm bore and 42 mm seat put the shaft back where it belongs.

No. The bushing is the wear item in that joint, so it can be changed on its own as long as the shaft still measures 17 mm and the housing bore is not damaged.

64.2 g, and it is catalogued as the guide bushing on its own. That weight and the 23 mm height are what make it practical to keep as a shelf spare for an MX48 drive.

Yes. Price is quoted on request and scaled by quantity, so put the quantity and the four sizes in the same enquiry and the quote comes back against this part number.