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The team at Dormer Pramet has created a specific selection of cutting tools and accessories aimed at the MRO professional. The brands within this offer are Precision Twist Drill (PTD), Union Butterfield and Dormer. Targeted at delivering MRO professionals an offer that is easy-to-select and comprehensive for their needs, our experts have identified drills, taps, dies, reamers, end mills and rotary burrs that will deliver reliable and cost effective results in portable and machine applications in a wide range of operating conditions in various materials.
The selection of drills in the program includes stub, jobber, mechanics lengths and S&D reduced shank drills. To cover the breadth of applications within the MRO segment, there are drills for general purpose machine and portable drilling. These include the popular HSS R10 series for right hand drilling and HSS L10 series for left hand drilling. Also included are the carbide DC series of center drills. There is a specific selection for sheet metal drilling and spot weld drilling.
The drill program is highlighted by the MRO drills that cover most ferrous applications and are suitable for use in portable drilling, drill presses and other operations within this segment. The MRO drills are available in jobber length (301JD style), heavy duty jobber length (331HD, 332HD, 333HD styles), mechanics length with “tri-flat” shanks (321MD style), stub length (331SM, 332SM styles) and reduced shank (341SD, 342SD styles). Within this offer there are different surface treatments to cover the wide range of MRO operating conditions. As well, the program contains conventional 118-degree point geometries as well as 135-degree self-centering split points for more challenging applications. Sets within each style are available in a rust resistant, water and shatter proof case for easy carrying and all-around use.
The MRO segment offer extends into drills, taps, combination drill & tap tools, dies, reamers, countersinks, counterbores, end mills, carbide rotary burrs, drilling & tapping fluids and accessories.
Related Glossary Terms
- high-speed steels ( HSS)
high-speed steels ( HSS)
Available in two major types: tungsten high-speed steels (designated by letter T having tungsten as the principal alloying element) and molybdenum high-speed steels (designated by letter M having molybdenum as the principal alloying element). The type T high-speed steels containing cobalt have higher wear resistance and greater red (hot) hardness, withstanding cutting temperature up to 1,100º F (590º C). The type T steels are used to fabricate metalcutting tools (milling cutters, drills, reamers and taps), woodworking tools, various types of punches and dies, ball and roller bearings. The type M steels are used for cutting tools and various types of dies.
- shank
shank
Main body of a tool; the portion of a drill or similar end-held tool that fits into a collet, chuck or similar mounting device.
- tap
tap
Cylindrical tool that cuts internal threads and has flutes to remove chips and carry tapping fluid to the point of cut. Normally used on a drill press or tapping machine but also may be operated manually. See tapping.
- tapping
tapping
Machining operation in which a tap, with teeth on its periphery, cuts internal threads in a predrilled hole having a smaller diameter than the tap diameter. Threads are formed by a combined rotary and axial-relative motion between tap and workpiece. See tap.
- twist drill
twist drill
Most common type of drill, having two or more cutting edges, and having helical grooves adjacent thereto for the passage of chips and for admitting coolant to the cutting edges. Twist drills are used either for originating holes or for enlarging existing holes. Standard twist drills come in fractional sizes from 1¼16" to 11¼2", wire-gage sizes from 1 to 80, letter sizes A to Z and metric sizes.
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