Four Sided Wood Planer Rubber Feeding Wheel Red Feed Roller with Keyway

Replacing a feed roller on a four sided moulder starts with a fitment question, not a parts catalogue: 120 mm outside diameter, 50 mm thickness, size listed as 120X30X50mm, and a keyway in the core. This is a red, plain-surface rubber feed roller bonded to an aluminum core and sold as a spare for four side planers. The keyway carries the drive torque from the shaft, so the roller turns with the machine instead of slipping on it. Measure the old roller, match the numbers, then order.

A four sided moulder rarely stops for the cutter. It stops for the feed roller at the infeed: the red rubber face glazes to a shine, boards start skating instead of being pulled, and the operator ends up hand-feeding stock past the first head to keep the line running. Three symptoms, one 120 mm part.

This roller is a red rubber wheel on an aluminum core, plain surface, with a keyway cut into the hub. The size is listed as 120X30X50mm, with 120 mm outside diameter and 50 mm thickness stated separately on the sheet. It is the feed wheel for four side wood planers and moulders, and the size string doubles as the part number, so a repeat order needs no drawing.

The keyway is what keeps the roller turning with the shaft. Its key sits in the shaft keyway, so torque passes through steel to steel instead of a friction grip on a smooth bore. That matters on a four side planer, where the roller drives a 50 mm band of rubber against the board while the cutterheads load it from four sides.

Rubber meets the timber, aluminum carries the shaft. The plain face presses one continuous contact band across the board rather than toothed points, and the aluminum hub holds its shape under load. Price is quoted per enquiry.

A spare part is a drawing four lines long, and every line of it is here.

• Red rubber face. A red compound moulded onto the core, the colour that marks this wheel on a parts shelf.
• Plain surface. Smooth, with no grooves or teeth, so the board is pressed by one continuous 50 mm band.
• Keyway in the hub. The key slot is cut into the aluminum core, so torque is carried by the key rather than by friction on the bore.
• Aluminum core. Metal where the shaft and the key sit, rubber only where the timber is gripped.
• 120 mm outside diameter. The figure the feed frame is set around, so the new wheel sits at the same working height as the old one.
• 50 mm thickness. The width of the rubber band that meets the board, listed next to the diameter on the sheet.
• 120X30X50mm is the part number. One string carries the whole size, and a second order is placed from that string.
• Four side planer feed position. Sold as a spare wheel for four side wood planers and moulders, not as a machine.
• Bonded and finished. The wheel arrives moulded onto its core, ready to slide on the shaft and take the key, with no facing before fitting.

A worn feed roller leaves two bad options: wait for the machine builder's part, or buy on diameter alone and find the key will not go in. A 120 mm red rubber wheel with its keyway cut into an aluminum core takes both off the table.

• Drive goes through the key, not the rubber. The key slot carries torque, so a 120 mm roller cannot spin on a polished bore under a loaded cut.
• One band, not a row of teeth. A plain face presses a continuous 50 mm band, so the pressure on the board is spread instead of concentrated.
• Rubber where it wears, metal where it carries. The face is red rubber, the hub is aluminum, so the part that grips is replaced whole with one wheel.
• A roller, not a feed unit. One wheel in stock turns a glazed face into a short swap on the shaft, not a feed frame rebuild.
• Repeat orders stay identical. Because 120X30X50mm is the part number, the second wheel is measured against the first, not guessed.
• Readable stock. Red separates this rubber wheel from the black and PU wheels on the same shelf, so the picker does not need a caliper.
• Fitted without machining. The wheel is bonded on its core and keyed, so it goes from the box to the shaft with no facing or boring first.

Yes, if the numbers on the old wheel match. Check 120 mm outside diameter and 50 mm thickness against the sheet, then measure the mounting side and the key slot; when they agree, this roller mounts on the same shaft.

It takes the drive torque off the bore. The key sits in the shaft keyway, so the 120 mm rubber face turns at shaft speed instead of relying on a friction grip, which is what a smooth bore depends on.

The spec sheet does not name it, so confirm it with a caliper. 120 mm outside diameter and 50 mm thickness are listed separately; the 30 mm figure is the mounting side of the size string 120X30X50mm, and it has to match the old roller.

Smooth. The surface is listed as plain, which means no grooves and no teeth, so the board is pressed by one continuous 50 mm band of red rubber.

Rubber, on an aluminum core. The sheet lists red rubber and aluminum core, and it sits alongside PU feeding wheels on the same shelf, so check the old part before ordering if the machine was built around a PU wheel.

No. The wheel arrives with the red rubber bonded to its aluminum core and the keyway already cut, so it slides onto the shaft and takes the key with no facing first.

This listing is one size and one colour: 120X30X50mm in red. Send the outside diameter, thickness and mounting side you need and the answer comes back against those numbers rather than against a catalogue name.

Send the size and the quantity you want for a quote. Price is quoted per enquiry because quantity and size mix change it, so quote 120X30X50mm first.