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Drill Bit HD Cobalt St 135d SplPt #28 2-7/8" YLW (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics HSSCN28E – Frequently Asked Questions
1) Is the Metallics HSSCN28E a #28 wire gauge drill bit, and what hole size does that cut?
It's a #28 wire gauge size bit, which in the standard wire gauge drill series is 0.1405 inch (just under 9/64). Use it where a spec calls out a numbered gauge hole rather than a fractional size, such as tapping prep or pilot holes for machine screws in sheet metal and strut.
2) What does the 135 degree split point on this cobalt drill bit do differently than a standard 118 degree bit?
A 135 degree split point starts cutting on contact without walking, so you can drill stainless, strut channel, and hardened plate without center punching first. A standard 118 degree jobber point needs a punch mark or it skates. That self-centering geometry is why the HSSCN28E is spec'd for metal work rather than wood.
3) Will a cobalt bit like this hold up in stainless steel and hardened material?
Yes. The HSSCN28E is a cobalt high speed steel bit, and cobalt alloy keeps its hardness at the higher temperatures you generate in stainless, Inconel, and work-hardened plate. Run it slower with steady pressure and cutting fluid; cobalt resists the heat but it is more brittle than plain HSS, so avoid side loading in a hand drill.
4) Does the HSSCN28E have a straight shank that fits a standard 3-jaw chuck?
Yes, it is a straight shank bit, so it chucks into any standard keyed or keyless 3-jaw drill chuck. It is not a hex shank or quick-change bit, so it will not snap into an impact driver collet.
5) Is 2-7/8 inches the full length of this bit or the cutting depth?
2-7/8 inches is the overall length of the bit, shank included, so usable drilling depth is less than that once the flutes and chuck grip are accounted for. For deeper holes in the #28 gauge size you need a longer aircraft-length or extended bit instead.
6) How many drill bits come in the Metallics HSSCN28E pack?
One bit per pack, supplied in a pouch. If you are stocking a service van or an MRO crib and need multiples of the #28 size, order by the quantity of bits you want rather than expecting a set.
7) What is the yellow coating on this Metallics cobalt bit for?
The yellow finish is the bright identification color Metallics uses on this cobalt line, and it makes the #28 easy to pick out of a mixed index. Order by the part number HSSCN28E to be sure you get the #28 gauge size, since neighboring gauge sizes look nearly identical on the shelf.
How fast can I get the Metallics HSSCN28E delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics HSSCN28E come with a warranty?
Absolutely. The Metallics HSSCN28E is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics HSSCN28E?
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installation tips, and troubleshooting. Contact Us
Why buy the Metallics HSSCN28E from ZenSupply?
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