HELICAL LAP AND
MANUFACTURING
COMPANY

Internal Helical Slot Laps,
Arbors, Expanders, Pullers
External Laps
and Holders
Lapping
Compounds
Hand Lapping
Plates
Needle
Eye Laps
Specialty
Products

INTERNAL HELICAL
SLOT LAPS, ARBORS, AND EXPANDERS

HOW TO SELECT THE PROPER INTERNAL LAP

INTERNAL LAPS should be longer than the length of the bore being lapped.
STANDARD INTERNAL LAPS are manufactured undersize to allow for stock removal and abrasive clearance.  Order a 1/4" lap to finish a .2500 diameter bore.
RADIAL GROOVES are recommended for most lapping applications; however, there are instances when non-grooved laps are recommended, such as when lapping interrupted bores.

SPECIAL SIZE AND/OR LENGTH LAPS AND ARBORS
CAN BE MADE TO SUIT YOUR APPLICATION.

All internal laps 3/16" and larger are shipped with radial grooves.  If grooves are not preferred, specify "no radial grooves" when ordering.

 
HELICAL LAP & MFG.
PHONE:
(586) 307-8322 

info@helicallap.com
FAX: (586) 307-8325

FREE TECHNICAL ASSISTANCE AVAILABLE
Detailed "LAPPING GUIDELINES" available upon request.
Specifications shown subject to change without notice.

HELICAL