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How to identify replacement cutting teeth and wear parts

DRILLNOVA · Technical guide · Updated

Identify the installed tooth, holder and retention system before ordering. The worn part explains the service condition; a drawing or unused reference establishes the intended fit.

01

Preserve the part reference

Photograph the new and worn part from matching angles. Keep the complete model suffix and previous drawing reference. Record the tool type and ground interval when explaining unusual wear.

B47K22 example before use. A complete part view is more useful for identification than the carbide tip alone.
B47K22 example before use. A complete part view is more useful for identification than the carbide tip alone. Tap image to enlarge.

02

Check the mounting around the part

Show the holder, retaining components and installed position. If the holder is worn or distorted, include it in the repair review.

For your tool, confirm the installed tooth and holder against the same selected assembly drawing.

Workshop reference: checking tooth and holder projection from a fixed reference surface.
Workshop reference: checking tooth and holder projection from a fixed reference surface. Tap image to enlarge.

Four checks that prevent an incomplete replacement

From removed part to installed assembly
CheckWhat to doWhat a mismatch looks like
Seat and shoulderRemove packed material and inspect the actual contact surface. Compare the unworn reference shoulder.The new part stops short or rocks in the seat.
RetentionIdentify the clip, sleeve or pin separately; check its engagement after seating.A part looks fitted but can move past its intended retaining position.
Working projectionMeasure from the same fixed holder or tool reference before and after fitting.One tooth projects beyond its specified position and takes unintended first contact.
Rotation where designedWith the tool supported and isolated, check that a round-shank tooth can rotate in its matched holder.Packed fines, a distorted bore or the wrong sleeve prevents rotation.

A correct replacement order separates teeth, holders and retainers. A complete working check adds installed projection and neighbouring clearances; replacing the tooth cannot restore a worn holder bore. See the B47K22 dimensional example.