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IMPORTANT INFORMATION
REGARDING DRILL BUSHINGS AND TOOLING COMPONENTS
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AVAILABILITY! We pride ourselves in being able to ship your order the
same day we receive it. At All American we keep a huge inventory of drill
bushings and tooling components... ready when you need them. ORDERING INFORMATION Example:
Bushing
I.D. O.D.
Length Or, using the ANSI symbols assigned to the various sizes listed in the catalog: Example: 24 P 40-12-5/16 ALL BUSHINGS WILL BE CONSIDERED TO BE FINISH GROUND. When ordering an unground O.D. specify unground and add the letter "U" to the ANSI symbol, or after the bushing type. The example shown is for 24 headless press fit bushings with a 5/16 I.D. or drill size with a 5/8 O.D. outside diameter and 3/4 inch length. STANDARD SIZES: All bushing sizes listed herein are considered to be Catalog Standard Sizes and should be ordered whenever possible. Standard drill sizes, specified in the bushing I.D. range columns, are those standard letter, number, and fractional sizes defined by the American National Standards Institute and listed on the inside back cover of this catalog. Any other decimal or millimeter size within a given range is considered special and will be priced accordingly. ANSI STANDARDS: The United States of America Standards Institute (USASI)
is now known officially as the American National Standards Institute (ANSI). All
former USA Standard bushings are now identified as ANSI Standard bushings.
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#107-50 ORDERING METRIC DRILL BUSHINGS: Example: PM-12-16-8 I.D. TERMS TRADE TERMS: 1% ten days, net 30. (invoices not paid within 60 days are subject to 1% service charge.) SHIPMENT: All prices are quoted F.O.B. shipping point. PRICES: Subject to change without notice. GUARANTEE I.D. TOLERANCES: All American & ANSI Standard:
I. D. TOLERANCES: Metric Standard ANSI bushings: Standard ANSI metric bushings: COUNTERBORE: Bushings with small holes are counterbored leaving correct drill bearing to facilitate chip removal and lubrication. NO COUNTERBORE: Bushings normally counterbored may be ordered without counterbore by specifying "No Counterbore" or using abbreviation "NCB." (Priced as specials.) RADIUS: All bushings feature a blended radius at the drill entrance unless otherwise specified. LEAD: All press type bushings feature a concentric ground lead in addition to a chamfer on exit end of bushing. STEEL: Our bushings are manufactured from selected steels known for their long wear and stability. Bushings are also available from other materials at extra cost (bronze, M-2, D-2, A-2, stainless steel, etc.) HARDNESS: Rockwell C 62 - 64 in the hole. CHIP CLEARANCE: Due to the abrasive action of metal particles, sufficient clearance should be provided between the drill bushing and the workpiece to allow for removal of chips. Careful consideration of this point will aid in producing accurate holes. (A rule of thumb is the greater the clearance the greater chance of error.) Example: The recommended chip clearance for metal producing small chips, such as cast iron, equals one-half the drill diameter. The recommended chip clearance for metals producing long chips, such as cold-rolled steel, equals one to one and one-half times the drill diameter. Maximum Accuracy: Use drill bushings of different lengths to obtain the combined advantages of adequate chip removal and precise accuracy. Example: Use a drill bushing that is short enough to provide chip clearance during the drilling operation. Next, use bushings long enough to contact or closely approach the work piece for the reaming operation. |
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