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STROTON Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (7mm x 3pcs) — Open-Box, 17% Off
Brand: STROTON
Condition: Used - Mint
$1082
$1300
-17% Save $218
Updated: Yesterday
Description
Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
3 Steps Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood.
This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit.
Includes :M42 Cobalt drill bit 7mm x 3pcs ,135 Degree Split Point
Product Advantages:
(1) Sharp Edge starts drilling immediately with less force and eliminates "walking" across the work surface.
(2) Holds up better than generic high-speed steel,Cobalt gives high-speed steel more heat and wear resistance.
(3) This drill bits set is made of Premium Cobalt (80,000 dollars per ton).
(4) The M42 metric cobalt drill bits can cut through Stainless steel and Hard metal,Hard wood, although they can be used for softer materials such as Aluminum,Plastic.
Some Important Tips about drilling stainless steel and hard metal:
(1)Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel.
________________________________
Stainless Steel
____________________________
Drill diameter RPM
____________________________
≤5mm 1000~700
____________________________
5-10mm 700~350
____________________________
10-15mm 350~200
________________________________
(2)Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce or water if you don't have engine oil.
(1) Sharp Edge starts drilling immediately with less force and eliminates "walking" across the work surface.
(2) Holds up better than generic high-speed steel,Cobalt gives high-speed steel more heat and wear resistance.
(3) This drill bits set is made of Premium Cobalt (80,000 dollars per ton).
(4) The M42 metric cobalt drill bits can cut through Stainless steel and Hard metal,Hard wood, although they can be used for softer materials such as Aluminum,Plastic.
Some Important Tips about drilling stainless steel and hard metal:
(1)Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel.
________________________________
Stainless Steel
____________________________
Drill diameter RPM
____________________________
≤5mm 1000~700
____________________________
5-10mm 700~350
____________________________
10-15mm 350~200
________________________________
(2)Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce or water if you don't have engine oil.
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Amazon Warehouse
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- 30-day return policy
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Product Details
- SKU:
- awhd-us-b08h1l3mb4
- Model:
- M42 Cobalt-8 Independent Packaging
- Country:
- US
- ASIN:
- B08H1L3MB4
Shopping Smarter
Common questions about buying open-box and refurbished.
Why buy refurbished or open-box?
Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $2 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.
What's the difference between open-box and refurbished?
Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.
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