Annular Cutter Shank Compatibility: Weldon, Bayonet and Adapters
Distinguish Weldon, double-flat, straight and bayonet cutter records, then match the exact pilot and approved adapter direction.
MagDrill field guide
Choose mag drill bits by cutter interface, cutting depth, pilot arrangement, material and the exact limits of your magnetic drill.
Start with the mag drill buying guide, then use these focused articles to check the details that matter for your next job.
Most magnetic drills are designed around annular cutters, which cut a ring and leave a center slug. But “mag drill bit” is not a universal fit label: some exact machines can also use twist drills only with a manufacturer-approved chuck or adapter, and different annular systems use different retention and pilot arrangements.
Before buying, match the cutter to the machine’s documented interface and pilot system, then check permitted diameter and cutting depth. Use the Cutter Compatibility Checker to expose remaining questions; its shortlist is not a substitute for the exact machine and cutter manuals.
Record the exact machine and holder, work material, hole diameter and rated depth, manufacturer-named shank family, and pilot part number. Then use the HSS versus carbide guide to check the material and operating range. If any field is unknown, keep the candidate unresolved rather than treating a nominal 3/4-inch shank or longer cutter as proof of fit.
Distinguish Weldon, double-flat, straight and bayonet cutter records, then match the exact pilot and approved adapter direction.
Separate rated cutter depth, physical tool length, drill capacity, pilot choice and Stack-Cut geometry before ordering annular cutters.
Maintain an annular cutter inventory with condition checks, correct lubrication, organized storage and suitable professional resharpening.
After the interface and size are confirmed, compare HSS with carbide for the material and operating range. A hole saw is a different system; a similar hole diameter does not make the holders or pilot arrangements interchangeable.
Compare annular cutters and hole saws by machine compatibility, material, depth, workholding and repeat-hole requirements.
Compare HSS and carbide annular cutters by exact material, speed, shank, depth, pilot and documented service-life conditions.
Filter by the exact machine interface, permitted diameter, depth and pilot arrangement before treating any listing as a candidate.
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Cutter / setA listing-described 12-piece, 1-inch-depth set spanning 7/16 to 1-1/8 inches; confirm the shank and included pilots.
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AccessoryUse only where the drill and cutter manufacturers approve this lubricant and its application method.
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Cutter / setA listing-described six-piece Weldon set with 2-inch cutting depth and 1- to 2-inch diameters; verify drill capacity and pilot coverage.
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Cutter / setA listing-described 14-piece carbide-tipped set spanning 7/16 to 1-1/16 inches; its retained record does not confirm the interface.
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