boring head

* Simple, extremely rigid construction* Hardened and ground shanks* One each centered and offset vertical boring tool holes* Cross hole for greater versatility and capacity* Dependable adjustment* For spread, .001-inch graduations for closer readings* Perfectly balanced for high speed operations

Tempered alloy steel for proper boring rigidity. Chipbreaker breaks chips into small, tight rolls and eliminates long, stringy chips winding around tool and clogging work area. Clamp screw under bar also prevents chips from clogging screw head. Cartridges hardened to 60-64 Rockwell, and ground to…

…spiral bevel gears are heat treated and ground alloy steel. The 1-inch R8 milling machine arbor is made of heat treated and ground alloy steel. Spacers are ground parallel and square with bore. Set consists of right angle attachment head, milling arbor, collet drawbar (stud) and arbor support.

The forerunner of all APT heads. Except for bar holder, unit has changed little. Its practical simplicity and proven performance have consistently made it a big seller. Advantages of a square design are seen in the extremely wide base and 1-inch hole capacity for boring bars and tools. Enhanced with…

Heads feature direct read .001 micrometer dial, precision hardened steel construction and boring capacity to 4 inches. Sets consist of head and PB500 10-piece, 1/2-inch shank carbide tipped boring bar set in 5/16- (standard), 7/16- (medium) and 9/16-inch (long) lengths. Includes storage case.

The finest materials and craftsmanship combine to provide strength, flexibility and accuracy in uniquely designed tool. Hardened and ground shanks.

Set handles many boring needs. All steel head and nine boring bars. Head is USA made with standard 1/2-inch tooling capacity, direct read .001 micrometer dial, and hardened construction. Imported boring bars have carbide tips and hardened and ground shanks and include stand.

Use with APT precision boring heads. Interchangeable.

Direct read .001-inch micrometer dial. Precision hardened steel.

Fits all heads with 1-1/2 - 18 threaded backs.

Use with APT precision boring heads. Interchangeable.

Standard 1/2-inch tooling capacity. Direct reading .001 micrometer dial. Hardened steel and entirely manufactured in the U.S. Boring capacity of up to 4 inches net of 1/2 cross hole capacity.