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Drillpro 99Pcs M35 Cobalt Drill Bit Set 1.5-10mm HSS-Co Jobber Length Twist Drill Bits For Stainless Steel Wood Metal Drilling
I have bought these drills twice before an they a really good. Crazy level of hardness and hardly heat up at all. You can do 5 or 6 holes in the drill press and touch the drill afterwards. The downside is you need to be more careful with them as they break more easily. You need to drill slower and don't push as hard as they can cut in too quickly and bind up.
Description:
Drillpro 99Pcs M35 Cobalt Drill Bit Set 1.5-10mm HSS-Co Jobber Length Twist Drill Bits For Stainless Steel Wood Metal Drilling
Features:
[High quality material]: M35 cobalt. Added 5% cobalt to improve hardness and heat resistance. The Rockwell hardness is up to 67. It has a faster cutting speed and a longer service life, which is 12 times that of an average HSS bit.
[Accurate Card Position]: Self-centering. The guiding separation point of the 135° rapid cutting is automatically centered and can be penetrated quickly under a small pressure. The straight shank can be firmly fixed and accurately centered, suitable for standard drill trays and conventional circular trays.
[Efficient and fast]: High-efficiency drilling can be carried out without walking. Remove debris and particles faster and easier.
[Low cost]: The lowest cost of drilling each hole. The solid cobalt steel drill bit can be reground.
[Split point]: You can drill directly to the required size without pre-drilling
[Widely used]: Suitable for drilling stainless steel, copper cast iron, galvanized pipe, iron, aluminum alloy and other non-heat-treated metals whose hardness is less than HRC38. Not suitable for hardened steel/high carbon steel. If it cannot penetrate, try to adjust the speed.
Specifications:
Product Name 99Pcs M35 Cobalt Twist Drill Bits Set
Brand Drillpro
Material HSS-Co M35 Cobalt
Size
16 Pcs x 1.5 mm, 16 Pcs x 2 mm, 15 Pcs x 2.5mm,
10 Pcs x 3mm, 10 Pcs x 3.2mm, 8 Pcs x 3.5mm,
8 Pcs x 4mm, 3 Pcs x 4.5mm, 3 Pcs x 5mm
2 Pcs x 5.5mm, 2 Pcs x 6mm, 2 Pcs x 6.5mm
2 Pcs x 8mm, 2 Pcs x 10mm
Measurement System Metric
Shank Type Straight Shank
Shank Shape Round
Quantity 99 Pcs × Drill Bits
Note:
- Cobalt drill bits require slow RPM when drilling metals. The suggested RPM is only for your reference. It may vary from different
materials. You can start from a lower RPM and adjust it higher slowly. Once the bit can get into the workpiece. the adjustment
should be stopped.
Package Included:
99 Pcs × Drill Bit
1 Pc ×
Storage Box
OP, just curious, if you are saying they are good, how come you've already gone through 198 drills (2 sets) and is buying a 3rd set? Honest question - not having a dig at ya.