Proper Reamer Care


Questions? Email Sonnax Tech Support about this article.

1. Check Reamer After Each Use

Aluminum build-up can occur on the cutting edges after bore reaming.

2. Remove Build-up

Extend the life of your reamer by removing aluminum build-up with a fine-grit diamond honing tool such as the Sonnax EZ-LAP-HONE.

Carefully run the tool along the inside of the reamer cutting edges to remove build-up.

This technique is for removing build-up only, not for re-sharpening. Over-aggressiveness with the hone will ruin the reamer.

3. Properly Store

Always store clean reamers in their protective tube after use.

General "F-Tool" Reaming Instructions

1. Bore Preparation

a. Clean the bore thoroughly in a solvent tank.

b. Generously lubricate the bore and reamer with cutting fluid (i.e. Mobilmet S-122, Lubegard® Bio-Tap, Tap Magic™, etc.). For best results, provide a continuous flow of water-soluble cutting fluid (i.e. Mobilmet S-122) during the reaming process.

c. The reamers should be turned using a low RPM, high-torque drill regulated to a maximum of 200 RPM.

d. Examine the bore after cleaning for surface finish, debris and burrs. Flashing and burrs on the exit side of land and in bores must be carefully removed. A small piece of Scotch-Brite™ material attached to a wire and powered with a drill motor is ideal for the task. However, Scotch-Brite™ is a very abrasive material and all residual Scotch-Brite™ debris must be removed afterward to ensure particles do not migrate or remain embedded in the surface. Cleaning this material out should involve several progressive steps using solvent on a lint-free rag.

Cautions & Suggestions

  • Turning the reamer backward will dull it prematurely.
  • Pushing on the reamer will result in poor surface finish and inadequate and sporadic material removal.
  • Never use a crescent wrench, ratchet or pliers to turn the reamer.
  • A dull reamer will cut a smaller hole. Reamers can be sharpened, but should only be done by a professional tool sharpener. Actual life of a Sonnax reamer before resharpening or replacing averages 50–70 bores.

2. Bore Reaming

Use the associated “F-Tool” kit and VB-FIX reaming fixture as illustrated below to ream the bore.

Related Part(s)
Subject(s) Included
  • Valve Body Reaming
  • General Shop Practices

While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.

Was this helpful? No

Thanks for your feedback! Contact Sonnax tech support for assistance.

Thanks for your feedback!