Best Hss Aircraft Counterbore

Aibesy 7pcs/set Counterbore Set M3-M12 High-speed Steel 4 Flutes Straight Shank Counterbore End Mills

High speed steel, high quality and durable..
It includes 7 sizes in one counterbore set(M3, M4, M5, M6, M8, M10, M12)..
An essential hardware tool for industrial..
The counterbore set works great in counter bored hole..
Apply to cast iron, steel, copper, aluminum, conventional hardness of stainless steel and die steel, etc..

1，The top shoulder design prevents over drilling into material and potentially damaging inner components of the electrical and junction boxes when hole is completed. It’s safe cutting..
2，Ideal for electrical and plumbing tradesman，construction, aircraft, maintenance. Use in plastics, sheet stainless steel and metal, wood, drywall, MDF..
4, The teeth are M42 Co 8%, Durable design for smooth cuts in sheet metal，Clean, fast cutting stainless steel long-lasting use. The special design teeth Cuts much faster than standard bi-metal hole saws up to 50%..

1，The top shoulder design prevents over drilling into material and potentially damaging inner components of the electrical and junction boxes when hole is completed. It’s safe cutting..
2，Ideal for electrical and plumbing tradesman，construction, aircraft, maintenance. Use in plastics, sheet stainless steel and metal, wood, drywall, MDF..
4, The teeth are M42 Co 8%, Durable design for smooth cuts in sheet metal，Clean, fast cutting stainless steel long-lasting use. The special design teeth Cuts much faster than standard bi-metal hole saws up to 50%..

1，The top shoulder design prevents over drilling into material and potentially damaging inner components of the electrical and junction boxes when hole is completed. It’s safe cutting..
2，Ideal for electrical and plumbing tradesman，construction, aircraft, maintenance. Use in plastics, sheet stainless steel and metal, wood, drywall, MDF..
4, The teeth are M42 Co 8%, Durable design for smooth cuts in sheet metal，Clean, fast cutting stainless steel long-lasting use. The special design teeth Cuts much faster than standard bi-metal hole saws up to 50%..
5, Package includes : 1 x 3-1/8" hole saw.

Professional high speed steel M42 (not M3) with cobalt 8% cutting teeth hardened to control the efficient and durable and reliable use on workpieces like sheet metal, Aluminium, wood, plastic, plasterboard, etc.. HSS M42 teeth is particularly good for high strength metal such as stainless steel (HSS M3 ones are good for middle strength metal but not high strength one) because HSS M42 contains cobalt 8%, which raises the hardness of the teeth. HSS M42 is about 20% more durable than HSS M3..
9-piece hole saws: 3/4"(19mm), 7/8"(22mm), 1-1/8"(29mm), 1-3/8"(35mm), 1-1/2"(38mm), 1-3/4"(44mm), 2"(51mm), 2-1/4"(57mm), 2-1/2"(64mm).
4-piece accessories: arbor 9/16"-1-3/16" with shank 3/8".
arbor center drill with shank 1/4". Center drills in this kit are all made of real HSS M2 and fully ground, while a lot of bi-metal hole saw kits are with low grade HSS center drills roll-forged..
with max cutting depth 1-3/8" (35mm) and ideal for drilling on sheet metal (even high strength metal because of HSS M42 with cobalt 8% teeth), wood, plastic, plasterboard, Aluminium, etc.. Particularly for sheet metal: the cutting depth is 2mm to 5mm, depends on the hardness of the metal and taking hand drill ....

【Main purpose】: Countersunk end mill is a specially manufactured tool, mainly used to cut holes that allow bolts or screw heads to be screwed into..
【High precision】: The cutting hole and bottom hole of this tool have high alignment accuracy. Because of its high production efficiency, it is often used in the machining industry..
【High-quality and durable】: The Pilot Counterbore End Mill Cutters is made of hard high-speed steel, with high toughness, wear resistance, and high hardness for high-speed cutting.
it is usually used for assembly on a milling machine..
【More time-saving】: Countersunk cutters reduce the time to change tools, improve the efficiency of machine actuator movement and save manufacturing time..
【Wide range of applications】: Counterbore bit set is suitable for milling of copper, aluminum, steel, cast iron, etc., and can be directly processed or finely processed to heat treatments..

Master helicoil thread repair kit used for creating stronger internal threads in all metals, composites, polymers and other materials by repairing damaged or stripped internal threads and regaining the original thread size..
304 Stainless thread inserts create longer lasting durable threads, increase the possibility of higher torque application in weaker metals..
Master thread repair kit includes a collection of tools including HSS drill, tap, thread inserts, installation tool, break pin tool..
Metric Size: 5pcs HSS drill bits, 5pcs HSS taps, 5pcs break pin tools.
Includes 25 Each thread inserts: M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5.
SAE Size: 5pcs HSS drill bits, 5pcs HSS taps, 5pcs break pin tool.
Includes 25 Each thread inserts: 1/4''-20, 5/16''-18, 3/8''-16, 7/16''-14.