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21000 Series
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Optional Coolant Type
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Optional Contour Nose
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FEATURES: These bushing assemblies are designed for use with air-feed drills, tappers, and back-spotfacers. They fit all standard drill motors, including Gardner-Denver, Keller, Aro, Buckeye, Quackenbush, Desoutter, and Ingersoll-Rand. Adaptor-tip assemblies consist of two pieces: a locking collar and a pressed-in shank. The collar screws into the air-feed drill's nosepiece, precisely aligns the shank, and locks the drill in place when rotated 30° counterclockwise after insertion in the liner. Shanks and collars can be ordered separately.
STANDARD SIZES: 21000-series bushings have 3/4-16 mounting threads. This series is available in three OD sizes to fit drill diameters from .0938" to .3750":| | 3/8" OD (Preferred size) | | | 7/16" OD | | | 1/2" OD (Preferred size) |
Preferred sizes can be mounted by any method, including Lock Liners, while other sizes have limited mounting options. See Dimensions page for part numbers and standard ID drill sizes. The prices shown apply to standard bushings only, with any standard USA or metric ID size within the stated range. | | A-21101-.1250 | | | | Adaptor-tip assembly, 1/8" ID | | | 21101-.1250 | | | | Shank only, 1/8" ID | | | 21000 | | | | Collar only |
STANDARD ID TOLERANCE:| | From #70 to 1/4" | | | | +.0001/+.0004 | | | Over 1/4 to 3/4" | | | | +.0001/+.0005 | | | Over 3/4 to 1-1/2" | | | | +.0002/+.0006 |
REAMER ID TOLERANCE: Reamer bushings have a different tolerance range than drill bushings:| | From #70 to 1/4" | | | | +.0005/+.0008 | | | Over 1/4 to 3/4" | | | | +.0006/+.0010 | | | Over 3/4 to 1-1/2" | | | | +.0008/+.0012 |
To order bushings with a reamer tolerance, add "-REAMER" to the part number:| | A-21101-.1250-REAMER (Special) |
OPTIONAL COOLANT TYPE: For coolant-inducing air-feed drills, we offer special shanks, collars, and reducers with internal coolant passages. Contact factory for pricing.| | A-11101-.1250 | | | | Adaptor-tip assembly, coolant type, 1/8" ID | | | 11101-.1250 | | | | Shank only, coolant type 1/8" ID | | | 11000 | | | | Collar only, coolant type |
OPTIONAL CONTOUR NOSE: Angular nose on shank is ideal for drilling on sloped or curved surfaces. Available on standard and coolant-type shanks. Add "-C" suffix to part number. Contact factory for pricing.| | A-21101-.1250-C | | | | Adaptor-tip assembly with contour nose, 1/8" ID | | | 21101-.1250-C | | | | Shank only, with contour nose, 1/8" ID | | | 21000 | | | | Collar only (standard) |
MATERIAL: 1144 Stressproof steel, heat treated to achieve Rc 62-64 ID hardness. Other materials readily available by special order (see Specials). |
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