DRILL JIG BUSHINGS
1Pages

General Information TECHNICAL DATA Materials Drill bushings are manufactured from C1144 stress-proof steel, or other high carbon steels known for their long wear and stability. Specialty steels are available upon request. I.D. Tolerances – ABC ANSI Standard Standard Drill SIzes Nominal Nominal Nominal Nominal Standard Sizes Standard sizes in a given I.D. range are sizes listed in the decimal equivalent chart either as a fraction, number or letter size. Any other decimal millimeter size within a given range is considered “special” and will be priced accordingly. Hardness 62-64 Rockwell C Lead All finish ground press-fit bushings have a concentric ground lead for exact alignment in press-fit starting. Countersink For drill entry end – a blended radius. Counterbore Certain bushings are relived in the I.D., depending on the bore-to-length ratio. They can also be supplied without counterbore. This type of bushing will be priced as a “special”. To order with counterbore, add the prefix letter “C” to the symbol. Special Bushings When a special unlisted hole size is required, or a special outside diameter or length is required, the bushing becomes a “special” and will be priced accordingly. When the bushing is not standard and has dimensions not according to the catalog, make sure that the length and O.D. are specified as well as the I.D. For Head-Type bushings, specify the head dimensions. Also, where tolerances are to be different from the catalog tolerances, be sure to include the tolerances required. When using drill bushings with special tools, such as reamers, counterbores, taps, pilots, etc., it would be an advantage is the exact hole size is specified–instead of the tool size. This is important since the tolerance and the clearance of these tools vary according to application. By processing these “special” from semi-finished blanks, prompt service is assured at reasonable prices. All “special” bushings will be priced from the factory. Ordering Information HOW TO ORDER – EXAMPLES Add Inside Diameter Size to ANSI Symbol Example: P–10–5–#77 5/32” Nominal O.D. 5/16” Length with #77 (.0180) Inside Diameter P–12–4–1/16 3/16” Nominal O.D. 1/4” Length with 1/16” (.0625) Inside Diameter P–10–5– .0191 5/32” Nominal O.D. 5/16” Length with .0191” Inside Diameter Net 30 Days, F.O.B. Garwood, New Jersey 07027 USA Pricing - Prices subject to change without notice For current price information, call or fax our Sales Department at: Suggestions for Ordering Complete tolerance and dimensional data on all ANSI and ABC standard bushings are given in this catalog. See Fractional Decimal Drill Size Chart on preceding page for list of standard drill sizes and decimal equivalents. In specifying a drill size, use the number, letter, fractional or decimal size. In specifying decimally, indicate the size in four places; Return of Bushings Special bushings are non-returnable. Full credit will be given for standard bushings if they are returned freight prepaid to the factory within two weeks after the date of shipment. For orders exceeding $100 U.S., written authorization must be obtained from the factory prior to return shipment. Example: use .1875, not .187. We would consider .187 as .1870, which would be special.