Machine tools and production equipment depend on precise, stable contact between components – a spindle housing seated square to its bearing, a machine bed level on its foundation, a linear way running true along its length. A shim only a few hundredths of a millimetre out of tolerance is enough to introduce vibration, uneven wear, or a positioning error that shows up in every part the machine produces afterward.
Datum laser cuts shims specifically for this environment: burr-free, dimensionally consistent, and available in materials that hold up to coolant, oil, and continuous vibration – whether you need one shim to fix a single machine or a repeatable batch for a production line rollout.
Where Shims Are Used in Machine Tools and Industrial Equipment
Machine bed and foundation levelling – correcting for an uneven floor or foundation settling, so the machine’s structural reference doesn’t drift over time.
Spindle and headstock alignment – fine adjustment where a spindle housing seats against its mounting face, correcting angular or axial misalignment that would otherwise show up as chatter or poor surface finish.
Linear way and slide alignment – maintaining parallelism along guide rails and ways, where even a small deviation compounds over the length of travel.
Vibration isolation and dampening – a shim placed between a heavy machine and its mounting reduces transmitted vibration, protecting nearby precision equipment and reducing wear on bearings and drives.
Motor and gearbox mounting – correcting shaft alignment between a motor and the equipment it drives, reducing bearing wear and premature coupling failure.
Retrofit and wear compensation – as machine ways, bearings, or mounting surfaces wear over years of operation, a shim restores correct spacing without machining or replacing the worn component itself.
Laser Cutting for Machine Tool Shims
Stamped shims need tooling before the first part is cut, which only makes sense at volume. Laser cutting goes straight from a drawing (or the machine’s actual dimensions) to a finished, burr-free shim – which matters for machine tool applications for two reasons:
A single machine often needs a one-off, exact-fit shim – not a standard off-the-shelf size – and laser cutting makes producing that economical.
Downtime is expensive. A machine tool that’s out of alignment or down for a shim replacement is a machine that isn’t producing. Laser cutting gets a precise replacement into production faster than waiting on stamping tooling.
For a production-line rollout needing the same shim across dozens or hundreds of machines, we can also move you to stamped production once the design is finalised — see our prototype-to-production capability for that transition.
Materials for the Machine Shop Environment
Shims in and around machine tools are routinely exposed to coolant, cutting oil, swarf, and continuous low-level vibration — conditions that make material choice matter more than in a clean, static application.
- 304 stainless steel is the standard choice: strong corrosion resistance against coolant and oil, and non-magnetic so it won’t interfere with magnetic chucks or sensors nearby.
- 301 stainless steel (spring/hard temper) suits applications needing higher stiffness in a thin section, such as spindle or bearing-housing shims.
- Copper or brass shims are used where electrical continuity or thermal transfer matters, such as motor mounting.
Full material comparison, thickness range and tolerances are covered on our stainless steel shims page.
Case study
Restoring alignment on a precision-mounted machine.
A manufacturer needed a circular shim to correct spacing on a piece of precision equipment, where even a small positional error would have affected downstream accuracy. Our team laser cut a custom circular shim to the required dimensions, restoring correct alignment without modifying the machine itself.
Machine Shims FAQ'S
Yes. A shim placed at a mounting point between a machine and its foundation, or between a component and its housing, can reduce transmitted vibration by improving contact and correcting minor misalignment that would otherwise cause resonance.
It depends on how far out of level the machine is, but levelling shims are commonly cut in the 0.1mm–0.5mm range and can be combined in small stacks where a specific total thickness is needed.
304 stainless steel is the standard choice for machine shop environments, offering strong corrosion resistance against coolant and oil along with a non-magnetic composition that won’t interfere with magnetic workholding.