• DEFINITION & TECHNICAL INFORMATION

PRESS FIT BUSHINGS: Designated as type P, are the least expensive and most popular bushings. Generally used in single step drilling. Pressed flush in the fixture plate they can be spaced closer together than other types of bushings. Available as unground with additional outside diameter stock.	HEAD PRESS SIT BUSHINGS: Designated as type H, they can accept heavier axial loads than type P bushings whether mounted with the head above the fixture plate or recessed into the fixture. Also available as unground with additional outside diameter stock.
SLIP/FIXED RENEWABLE BUSHINGS: Designated as type SF, these bushings are mostly used when the number of holes drilled will be greater than the expected life of the bushing. Type SF is also used when a hole is drilled, then a reaming or tapping operation is required. By slipping the bushing out of the liner anther size may; be installed for the next operation to be performed. Clamps or lock screws are used to secure them in the fixture.	FIXED RENEWABLE BUSHINGS: Designated as type FM, these bushings are mostly used when the number of holes drilled will be greater than the expected life of the bushing. By slipping the bushing out of the liner another size may be installed for the next operation to be performed. Clamps or lock screws are used to secure them in the fixture.
LINER BUSHINGS: Designated as type L, are similar to press fit type bushings but are pressed in the fixture to maintain precise location for the slip fixed bushings. Their hardened condition protects the fixture form the wear of repeated bushing replacement. These parts may be ordered as unground when extra outside diameter stock is needed.	HEAD LINER BUSHINGS: Designated as type HL, is used when excessive axial loads or pounding would dislodge the headless liner. Type HL may be used with the head projected above the fixture or countersunk flush with the top surface of the fixture. HL bushings are available with extra stock on the outside diameter when necessary, and ordered as unground. Length is measured overall including head.
UNILOCK LINERS: Type UL is similar to the head liner with the additional feature of a locking lip projecting up to replace the necessity of drilling, tapping and use of a lock screw when using slip/fixed bushings.	UNILOCK LINERS DIAMOND KNURLED O.D.: Designated as ULD. Their knurled outside diameter for use in imbedment fixturing is their main function.
EZ CAST LINERS: Designated type EZ-L, this type liner has the lock screw positioned for slip fixed bushing use in fiberglass, laminated or similar type fixturing. The EZ-L is positioned, then held in place with epoxy or similar potting compound.	SERRATA PRES FIT BUSHINGS: Known as type SP. These bushings have half length oversize serrations for extra holding capabilities in aluminum, masonite or wood fixtures.
DIAMOND GROOVE BUSHINGS: Designated as type DG, these bushings may be sued in a cast or potting application or pressed into soft fixturing such as laminates or acryliccs. Tyhis diamond knurled type holds better when axial and rotational forces exist.	SERRATA GROOVE BUSHINGS: Designated as type SG, these bushings may be used in a cast or potting application or pressed into soft fixturing such as laminates or acrylics.
TEMPLATE BUSHINGS: Type TB bushings are for light weight fixturing whose thicknesses range from 1/16 to 3/8 inch thick. They have serrations to add resistance to rotational forces and an aluminum ring to clamp it firmly to the template.	CHIP BREAKER BUSHINGS: When drilling material producing long stringy chips, the chip breaker feature is added to the exit end of the bushings to assist in breaking up these chips. The bushing projects beyond the fixture to allow the chips to be broken and not have to travel up the drill flutes. Add CH after the ANSI code. Example: SF 88-22 CH 1"
DIRECTED COOLANT BUSHINGS: Specially designed for heavy drilling needing coolant to flush the chips away from the drill and work piece. These slip type bushings with coolant hole liners ensure coolant flow directly on the drill without the inconvenience of flexible lines. Add DC after the ANSI code. Example: SF 48 -16 DC 1/2"	DIRECTED COOLANT LINERS: For use with directed coolant bushings. They are available as headless or with heads, and should be ordered the same length as the bushings to work properly. Add DC after the ANSI code. Example: L-64-16 DC.
COMBINATION CHIP BREAKER DIRECTED COOLANT BUSHINGS AND LINERS: These specialty type bushings offer the best assistance in drilling difficult material with the chip breaker extending beyond the liners to help break up the chips and the positive coolant flow to wash away the chips and provide lubricity to the drill making a very good combination frill guide.	GUN DRILL BUSHINGS: Used in gun drilling machines such as EL Dorado, DeHoff and Drillmation. Some machines use an SF type with an insert. Designated GDI for the inserts and GDL for the liner holding the insert. Other types of one piece construction are GDB liner and insert as one piece. DGDB deep hole gun drill bushigns have a long guide projecting beyond the chip box. Type GDH is for the DeHoff machine with the insert at the end opposite the head.
AIR FEED DRILL BUSHINGS: Are available for such tools as Busckeye, Aro, Gardner-Denver, Quackenbush, DeSoutter and Ingersoll-Rand. Threaded collars, shanks or tips and locking devices for their use are available.	OIL GROOVE BUSHING: Oil groove bushings are available in any ANSI style. They offer complete positive lubrication and they are available in 25 oil groove configurations plus wipers at the ends if needed.