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7/16" Hole Saw Arbor with Pins
Features
- Hardened mandrels for long thread life.
- Note: Set pilot drill point 1/8'' (3 mm) beyond tooth points.
- 118° split point pilot bit.
- Pins lock the saw to prevent over-tightening.
- Use with Klein hole saws: 1-1/4'' (32 mm) - 6-7/8'' (175 mm).
Manufacturer Resources
Product Specs
- Department:
- Tools
- Product Group:
- Power Tools & Accessories
- Product Subgroup:
- Hole Saws & Bits
- Product Type:
- Hole Saw Arbor
Klein Tools 31670SEN – Frequently Asked Questions
1) What size Klein hole saws does the 31670SEN arbor fit?
The Klein Tools 31670SEN arbor is made for Klein hole saws from 1-1/4 inch (32 mm) up to 6-7/8 inch (175 mm). Below that range you want a smaller arbor, since the pin drive and 7/16 inch thread setup here is built for the larger cup sizes.
2) Can I use this arbor with a hole saw smaller than 1-1/4 inch?
No. The stated range for this arbor is 1-1/4 inch (32 mm) through 6-7/8 inch (175 mm) Klein hole saws. Small-diameter cups have a shallower cup and a smaller thread boss, so they take a dedicated small arbor rather than this one.
3) How far should the pilot bit stick out past the hole saw teeth?
Set the pilot drill point 1/8 inch (3 mm) beyond the tooth points. That gives the bit enough bite to center the cut before the teeth engage, without the drill running away ahead of the saw.
4) What do the pins on this Klein hole saw arbor actually do?
The pins lock the saw body to the arbor so it cannot over-tighten onto the thread. On a plain threaded mandrel, cutting torque keeps driving the cup tighter and you end up fighting it off with pliers. With the pins engaged, the drive load goes through the pins instead of the thread, and the saw comes off by hand.
5) What kind of pilot bit comes with the Klein 31670SEN arbor?
It ships with a 118 degree split point pilot bit. The split point starts without a center punch and resists walking, which matters when you are starting a large saw on steel panel or a stud face. The mandrel itself is hardened for long thread life.
6) Is the 31670SEN a complete arbor assembly or just the mandrel?
Klein's 31670SEN is sold as the 7/16 inch arbor with pins and the pilot bit, under part number 31670SEN. The hole saw cup is a separate purchase, so order the Klein saw diameter you need alongside it.
How fast can I get the Klein Tools 31670SEN 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 Klein Tools 31670SEN come with a warranty?
Absolutely. The Klein Tools 31670SEN 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 Klein Tools 31670SEN?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
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