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FEATURES: Replaceable bush used for extra resistance to rotational forces under harsh conditions. This type of bush, generally used with a liner bush, has a milled locking flat to allow fastening securely with a Flat Clamp. FM bushes 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 bushes only, with any standard USA or metric ID size within the stated range. | | FM-20-16-.1250 | | Standard bush, 1/8" ID | | | FM-20-16-.1772 | | Standard bush,
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 bushes have a different tolerance range than drill bushes:| | 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 bushes with a reamer tolerance, add "-REAMER" to the part number:| | FM-20-16-.1250-REAMER (Special) |
NO-COUNTER-BORE ON LONG BUSHES: Extremely long bushes with a small ID size (marked * ) are counter-bored according to ANSI standards for proper drill-bearing length to eliminate binding and heat buildup. Add "-NCB" for applications that require these bushes without a counter-bore:| | FM-20-16-.1250-NCB (Special) |
MATERIAL: 1144 Stress-proof steel, heat treated to achieve Rc 62-64 ID hardness. Other materials readily available by special order (see Specials). |
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