Mini 4WD Racing Spacer M4WD-03/LB Light Blue Technical Fitment by 3Racing  [M4WD-03/LB]

Tamiya Mini 4WD M6.4 X 1.7 Ball Bearing Spacer (light blue) - 3Racing M4WD-03/LB
Price:
USD$2.50
Brand:
3Racing
Model:
M4WD-03/LB
Condition:
Brand New
Available in shop
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M4WD-03/LB light-blue spacer for Mini 4WD axle clearance

The M4WD-03/LB spacer is a thin, colour-identified washer finished to a dimension set for M6.4 x 1.7 ball bearings used in Mini 4WD assemblies. It is supplied as a dedicated axial spacer to control endplay between bearing outer face and adjacent axle or chassis components.

For workshop use the light-blue finish aids rapid parts identification, while the simple geometry ensures repeatable seating without altering bearing internal geometry. Maintain clean seating surfaces and inspect each spacer for burrs or deformation prior to assembly.

Engineering note: the part interfaces solely with the bearing outer race and surrounding faces; it does not change bearing internal clearance or bearing type. Correct installation preserves intended rotational freedom while preventing unwanted axial movement.

What dimensional checks are essential before assembly?

Verify bearing outer diameter and width correspond to M6.4 x 1.7, confirm axle shoulder flatness and check mating faces for contamination to ensure repeatable seating.

How does spacer thickness affect axial play?

Even small variations in spacer thickness change axial clearance; use consistent spacers when setting endplay and verify free rotation after tightening.

Any risks when used with sealed bearings?

Ensure the spacer does not deform or press against seal lips. If contact occurs, the seal integrity or lubrication retention can be compromised.

Recommended handling and storage for repeatable fitment?

Store in a clean, labelled container with like parts; inspect each spacer on a flat reference surface before reuse to detect any out-of-flatness.

Installation checklist for minimal wear?

Clean bearing and seating faces, confirm spacer orientation, avoid over-tightening, and perform a spin and runout check after assembly to confirm correct clearance.