// Custom Part · Spacer

Custom Machined Spacers

The simplest part to describe and the easiest to get wrong on length. Machined to an exact, repeatable length with parallel faces — any material, one-off or batch.

Tight length tolerance
Round · hex · shouldered
Any material
MOQ: 1 piece

Simple Part, One Critical Dimension

A spacer just sets a gap — but that gap usually has to be exact, and across a batch every spacer has to be the same length so stacks and assemblies add up. The two things that matter are length tolerance and parallel, square faces; the bore is sized to clear the bolt or fit the shaft. It sounds trivial, and that's exactly why imprecise spacers cause so much grief downstream. We machine them to a controlled length and keep the batch consistent.

Pair of precision aluminium spacers CNC machined by EKINSUN
Precision aluminium spacers — machined to an exact length with parallel faces.

Custom Spacer Specifications

AttributeCapability
MaterialsAluminium, steel, stainless, brass, Delrin/nylon/PTFE
ShapesRound, hex, square, shouldered, stepped
Length tolerance±0.02–0.05 mm (tighter on request), parallel faces
BoreClearance or fit to bolt / shaft
FinishAs-machined, anodize, plate, bead blast
QuantityOne-off to high-volume batch

Spacer Types We Machine

  • Round bore spacers — the everyday standoff between parts
  • Shouldered / stepped spacers — locating on one face
  • Hex spacers — for tool grip or appearance
  • Precision shim-style spacers — very tight length
  • Wheel & hub spacers — automotive (see our wheel spacer case)

Material Choice

Aluminium is light and cheap for general spacers; steel and stainless carry clamp load and resist corrosion; brass and plastics (Delrin, nylon, PTFE) insulate or run quiet. Tell us the bolt size, the gap you need and the load, and we'll recommend.

Need an odd length you can't buy off the shelf? That's exactly what custom spacers are for. Send the bore, OD and length (or a sample) and we machine them to size — one or a thousand. No drawing required.

Frequently Asked Questions

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Yes — length is the critical dimension and we hold it tight (commonly ±0.02–0.05 mm) with parallel faces, consistent across a batch so stacks add up.

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Aluminium, steel, stainless, brass and plastics, from tiny precision spacers to large bush-style ones — round, hex, square or shouldered.

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Both — a single custom spacer with no setup fee, or batches of identical spacers for assemblies and kits.

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Yes — send the spacer or just the bore, OD and length and we machine matching ones. No drawing needed.

Need Custom Spacers?

Bore, OD and length — or a sample. We machine them to an exact, repeatable size. Quote in 24 hours.

Get a Quote →
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