Old Craftsman router bit sharpener rig. How to?

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Forum topic by IppoJ posted 03-08-2011 05:40 PM 6418 views 1 time favorited 9 replies Add to Favorites Watch
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28 posts in 2684 days

03-08-2011 05:40 PM

Topic tags/keywords: vintage craftsman question router sharpening

A number of years ago my father gave me his old Craftsman 315.25070 router and accessories. I’ve used it occasionally over the years but last night I really dug through everything that came with it and found what I remember as a bit sharpening set up. Am I correct? Anyone know how to use it?

The angle and height of the fixture is adjustable and it has a machined base that fits onto a track about 10” long with a simple clamp on one end that probably clamps onto the router base? But, the stone certainly wouldn’t go into the router but it has a 1/4” shaft and the fixture also has a 1/4” collet that is indexed (Silver knob above the serial number)

and the stone:

9 replies so far

View IppoJ's profile


28 posts in 2684 days

#1 posted 03-10-2011 10:19 PM

I have some answers from the “Old Man”. The stone, amazingly, does go in the router. (!!??) The collet on the fixture holds an HSS bit. Presumably most bits then were either one, or three winged so there are only three indexed positions.

I just can’t imagine that stone spinning at 25k rpm.
I also can’t imagine Sears selling something this well made today.

View magnolia's profile


4 posts in 2610 days

#2 posted 04-27-2011 08:46 PM

I have the Craftsman manual in a PDF file if I can figure how to post to the forum?

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4 posts in 2610 days

#3 posted 04-27-2011 09:08 PM

Here’s the manual for your grinder:

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Bill White

4948 posts in 3984 days

#4 posted 04-27-2011 09:25 PM

I would not use it. Just put it in the archives as a quirky add-on. Go buy some carbide bits.


View Brandon's profile


4152 posts in 2975 days

#5 posted 04-27-2011 11:35 PM

I was given one of these recently, but had absolutely no idea what its function was! I don’t have the sharpening stone, only the apparatus, but at least now I know what it’s supposed to do. Thanks for the post!

-- "hold fast to that which is good"

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4 posts in 2610 days

#6 posted 04-28-2011 02:57 AM

Page 1 didn’t post last time, here’s the cover.

View rance's profile


4258 posts in 3185 days

#7 posted 04-28-2011 07:35 AM

FYI, not all routers spin at 25k. :) Yeah, it’d be wise to turn it down a bit. So what does the manual say about router speed when using this jig?

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View brianlee's profile


18 posts in 2625 days

#8 posted 04-28-2011 01:47 PM

I agree with Bill White. Put it in the drawer and buy some carbides. This jig is only good for HSS bits. And then I doubt if it’s accurate enough to properly sharpen a two flute bit. Craftsman is notorious for marketing ideas more than functional tools. Some of their ideas work, but many just fad away and are forgotten. This tool is one of the latter.

View IppoJ's profile


28 posts in 2684 days

#9 posted 04-28-2011 09:31 PM

Magnolia, thanks for posting that up. Very interesting.
Can you email the .pdf files to me?

No brianlee, I’m not going to use it. I’ve got carbides, this was just a curiosity. haha

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