Can I Install a .335 Shaft into a .350 Bore?

Yes, but a .335" shaft and a .350" bore are not a direct size match.

Because the .335" shaft tip is smaller than the .350" bore, the clearance between them needs to be properly addressed during installation rather than simply filled with more epoxy.

1. Use the Correct Shim

A .335-to-.350 shim can be used when installing a .335" shaft into a .350" bore.

The shim helps take up the clearance between the shaft and bore and keeps the shaft properly fitted and centered during installation.

Do not rely on additional epoxy alone to compensate for the size difference.

2. Dry Fit Before Installation

Before applying epoxy, perform a dry fit.

Confirm that:

• The shaft tip is .335"
• The bore specification is .350"
• The shim is the correct size
• The shaft inserts properly
• The shaft reaches the intended insertion depth

If the dry fit is not correct, identify the cause before bonding the shaft.

3. Can a .350 Shaft Fit Into a .335 Bore?

This is the opposite situation.

A .350" shaft tip is larger than a .335" bore, so it will not fit directly.

Do not force the shaft into the bore or aggressively sand the shaft down to make it fit.

Use a shaft tip size that is correctly matched to the bore.

Bottom Line

.335 shaft → .350 bore: Yes. Use a correctly sized .335-to-.350 shim.

.350 shaft → .335 bore: No direct fit. Do not force it.

Always confirm the shaft tip size and bore specification and perform a dry fit before bonding. The size difference should be addressed correctly rather than compensated for with extra epoxy.