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FEATURES: Replaceable bushing used for extra resistance to rotational forces under harsh conditions. This type of bushing, generally used with a liner bushing, has a milled locking flat to allow fastening securely with a Flat Clamp. FM bushings also have a standard recess on the other side to allow fastening with a Lockscrew instead.
STANDARD SIZES: 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. | | FM-20-16-.1250 | | Standard bushing, 1/8" ID | | | FM-20-16-.1772 | | Standard bushing,
4.50mm ID (.1772") |
STANDARD ID TOLERANCE:| | From #80 to 1/4" | | | | +.0001/+.0004 | | | Over 1/4 to 3/4" | | | | +.0001/+.0005 | | | Over 3/4 to 1-1/2" | | | | +.0002/+.0006 | | | Over 1-1/2 to 2-3/4" | | | | +.0003/+.0007 |
REAMER ID TOLERANCE: Reamer bushings have a different tolerance range than drill bushings:| | From #80 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:| | FM-20-16-.1250-REAMER (Special) |
NO-COUNTERBORE ON LONG BUSHINGS: Extremely long bushings with a small ID size (marked * ) are counterbored according to ANSI standards for proper drill-bearing length to eliminate binding and heat buildup. Add "-NCB" for applications that require these bushings without a counterbore:| | FM-20-16-.1250-NCB (Special) |
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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