Pre-Milling Cutter Spacer 56x46x30mm Steel Shim for Edge Banding Machine Universal Keyway

Need to reset pre-milling cutter position without ordering a new arbor? This 56 x 46 mm steel spacer with a 30 mm bore sits on the pre-milling arbor of an edge banding machine and takes up the offset in 5, 8, 10, 15 or 20 mm steps. One universal keyway fits both single and double keyway cutters, so a single part covers a mixed cutter set. Steel body, machined flat on both faces. Custom thickness, bore and keyway from 500 pieces. Supplied by Shunhongyu.

Three problems show up at every pre-milling station. The cutter creeps out of position because the spacer under it has worn thinner; the store room keeps a mixed bag of shims in different heights, so depth is re-set at every changeover; and the original spacer is on back order while the line idles. This 56 x 46 mm steel spacer with a 30 mm bore removes all three.

It is a pre-milling cutter spacer, also called a shim, that sits on the cutter arbor of an edge banding machine and sets how far the cutter sits from the panel reference face. Length 56 mm, width 46 mm, bore 30 mm: it seats on the same arbor shoulder as the part it replaces, without changing the cutter.

Thickness comes in 5 mm, 8 mm, 10 mm, 15 mm and 20 mm, so a change of edge thickness is a change of spacer, not of arbor. The keyway is universal: the same spacer fits single keyway and double keyway cutter stacks, so one part number covers a mixed cutter set instead of two.

The body is steel, machined so both faces stay flat against cutter and arbor shoulder once the nut is tightened. Custom thickness, bore and keyway are built to your drawing or sample from 500 pieces. Packing is an export carton with foam; price is quoted per thickness.

Everything below is the spacer itself: sizes, keyway, material, and what each changes on the machine.

• Two dimensions, one arbor seat — 56 mm length, 46 mm width, 30 mm bore: it locates on the same arbor shoulder.
• Universal keyway — Fits single keyway and double keyway cutter stacks, so a store room keeps 1 where it used to keep 2.
• Five thicknesses, 5 to 20 mm — 5, 8, 10, 15 and 20 mm cover the usual cutter offsets without stacking washers; the largest step is 4x the thinnest.
• Solid steel body — Steel machines flat and stays flat, so clamping load spreads across the full 56 x 46 mm face instead of a narrow ring.
• 8 mm minimum radial wall — From the 30 mm bore to the 46 mm edge there is 8 mm of steel, which keeps the bore round under the nut.
• Direct replacement — Drops in place of a worn or missing original spacer, with no arbor machining and no adapter sleeve.
• Built to your drawing from 500 pieces — Custom thickness, bore and keyway against a sample or drawing, MOQ 500 pieces.
• Carton and foam — Standard export carton with foam protection, so the machined faces arrive free of nicks.
• Pre-milling only — Fits the pre-milling unit of edge banding machines, ahead of the glue and banding stations.

The alternative to a correctly sized spacer is either waiting for the original part or stacking washers until the height looks right. Neither one holds cutter offset across a shift.

• Changeover stops being a measuring job. 5 thickness steps between 5 mm and 20 mm mean the offset is set by the spacer on the arbor, so the cutter returns to the same seat every time.
• One part number instead of two. A universal keyway lets single keyway and double keyway cutter stacks share the same spacer, so the drawer that held 2 sizes holds 1.
• No stacked joints left to creep. A 20 mm offset built from 4 thin shims gives 4 mating faces that can settle; one 20 mm spacer gives a single flat face under the nut.
• Cheap protection for the panels behind it. A spacer that loses height mills a shallow step into every panel until someone spots it; the cure is one steel ring of 56 x 46 mm, at a thickness you already keep.
• Consumable, not a project. Plain steel, one bore, 5 thicknesses, no moving pieces: it belongs in the maintenance store beside the cutters, not in a purchase requisition.
• Custom builds stay predictable. Thickness, bore and keyway follow your drawing or sample from 500 pieces, so a special height is not an arbor redesign.

Yes. With 56 mm length, 46 mm width and a 30 mm bore it seats on the same arbor shoulder as the original pre-milling spacer, so it is a drop-in replacement rather than a modification. Order the thickness that matches the offset you run now; if the old height is unreadable, measure from the cutter face to the arbor shoulder with the nut finger-tight.

Yes. The keyway is universal, so one spacer fits both single keyway and double keyway cutter stacks. That is why a store room running both cutter types needs one part number instead of two.

Order the thickness that produces the cutter offset your process needs. Spacers are available in 5, 8, 10, 15 and 20 mm; two of them can only be stacked if the arbor still has room for the nut. If you are unsure, send the cutter drawing with the required height and the spacer is matched to it.

56 mm is length, 46 mm is width and 30 mm is the inner diameter, or bore. The bore is the dimension that must match your pre-milling arbor; the 56 x 46 mm outline is what has to clear the cutter body and the housing.

Yes, with a minimum of 500 pieces. Custom size, thickness and keyway type are produced to your drawing or sample. Below 500 pieces, the standard 5, 8, 10, 15 and 20 mm thicknesses are the ones to choose from.

Steel, machined flat on both faces. Between the 30 mm bore and the 46 mm edge there is 8 mm of material, and that wall is what keeps the bore round under clamping load.

Measure it - wear shows as a thinner spacer, not as a visible crack. When the height drops, the cutter drifts toward the panel and mills a shallow step into the edge, so check the thickness across the 56 x 46 mm face with a micrometer at each cutter change and replace the spacer once the reading has moved.

Packed in standard export cartons with foam protection, and priced on request per thickness. Send the thickness list and the quantity you need for a quote; customized spacers start at 500 pieces.