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Router collet and bit diameter

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Forum topic by drcodfish posted 10-24-2015 01:53 AM 861 views 0 times favorited 20 replies Add to Favorites Watch
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drcodfish

119 posts in 413 days


10-24-2015 01:53 AM

My first post so please excuse any lapses in etiquette and rules violations.

I am in the latter stages of completing the construction of my work bench. What remains is to fabricate and install a leg vise and also the boring of dog holes. The Vise hardware is at the platers (will pick up later today) so thought I would embark on the very daunting task of putting the holes in the table top.

I purchased a 3/4” Onsrud HSS up-cut spiral router bit, and what I thought was a suitable router from Sears: 14 amp Variable Speed 2.5 peak HP soft start with fixed and plunge bases. So I am trying to set up the router and find that the bit shank won’t fit in the 1/2 ” collet. I used my dial caliper to determine that the bit shank measures 0.4990” and the collet opens to 0.4860”. WTF? I assume operator error here but can’t see what I am doing wrong (really, I thought this was as simple as it should be) nor how I can get this to work. I feel like an idiot, stick the shank in the collet and snug it up, right?

Any advice or suggestions would be greatly appreciated. Both the bit and the router are brand new never been used, so I would rather not resort to the BFH technique if possible.

Thanks in advance for your easy button responses.

-- Dr C


20 replies so far

View BurlyBob's profile

BurlyBob

3659 posts in 1727 days


#1 posted 10-24-2015 02:38 AM

I’m thinking you could contact Onsrud and see if they can mill the router bit down to fit or buy another bit that will fit. The other option would be do basically the same with the router.

I can only imagine the frustration you were having. Been there, done that. I wore out that t shirt.

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firefighterontheside

13454 posts in 1318 days


#2 posted 10-24-2015 02:46 AM

I’m sure it will fit. Can you take the collet completely off and try to put the bit in with the collet off. Do you have something tapered that you can put in the collet and help open it up a bit first.

-- Bill M. "People change, walnut doesn't" by Gene.

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ForestGrl

445 posts in 547 days


#3 posted 10-24-2015 04:15 AM

Prefacing this comment by saying (a) I’ve never faced this problem and (b) I could be completely off base…..but there’s a little voice in my head that says be cautious about putting a bit in a collet when the bit maxes out that collet, having to be forced. I suspect the little voice is concerned about being able to fully secure the router bit. What brand is the router kit you bought?

-- My mother said that anyone learning to cook needed a large dog to eat the mistakes. As a sculptor of wood I have always tried to keep a fireplace. (Norman Ridenour)

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drcodfish

119 posts in 413 days


#4 posted 10-24-2015 05:15 AM

That worked! I removed the collet completely and tried to insert the bit but still no lick. I turned it around (the collet) and the bit slid in to the collet as if they were made for each other in the same machine shop: smooth as glass and no wiggle room at all. So I pulled the bit out, turned the collet around and this time the bit slid in just as it was supposed to. I reinstalled the collet and now things work as they should. I took it apart again just to see if I could understand what the problem was in the first place but there was nothing obvious.

So, put the machine back together and made a few test holes in scrap 4X6 fir. What a nice smooth running machine. That ‘soft start’ is so much nicer than the instantaneous torque, makes me feel as if I am actually in control of things. I can see I am going to need a little more practice before I start poking holes in my maple bench top. It’s not Fine Woodworking quality, but nice enough that I don’t want to have ovalized rabbit holes all over the top.

Anyway, thanks for the suggestions, the only thing holding me back now is my lack of confidence.

PS: Bill, I was a volunteer firefighter for 15 years in a small town up in the Cascades of WA state. I worked for the Forest Service then and also spent some part of most summers working on forest fires. My son was out on the fires this summer for 5+ weeks.

-- Dr C

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drcodfish

119 posts in 413 days


#5 posted 10-24-2015 05:18 AM

ForestGirl: The router is a Sears product, specs mentioned in the first post.

-- Dr C

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ForestGrl

445 posts in 547 days


#6 posted 10-24-2015 06:24 AM


ForestGirl: The router is a Sears product, specs mentioned in the first post.

- drcodfish


I saw the specs, but Sears sells brands other than Caftsman. I didn’t have time or inclination to go through all of them. Congrats on getting things going smoothly.

-- My mother said that anyone learning to cook needed a large dog to eat the mistakes. As a sculptor of wood I have always tried to keep a fireplace. (Norman Ridenour)

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drcodfish

119 posts in 413 days


#7 posted 10-24-2015 06:51 AM

You are right of course, I should have been clearer in my note. I didn’t buy it because I am in love with Sears brand products, but the kit had everything I thought I needed (two bases, fixed and plunge, two different sized collets, variable speeds, that soft start feature and enough horses to push a 3/4” bit into hard maple) plus it was ‘on sale’ and I am a sucker for a deal. I didn’t force it but it didn’t slow one bit going through the DF off cut. The only use it has gotten was the few test holes I bored this evening, but so far I like it.

By the way, I noticed on your home page that you are in the Puget Sound area, so am I. I work in Olympia (so does my wife) but we live in a small town 30+ miles to the south out in the sticks between Centralia and Aberdeen.

-- Dr C

View jerryminer's profile

jerryminer

528 posts in 903 days


#8 posted 10-25-2015 12:19 AM

So, if you care, I suspect that the reason your bit didn’t fit at first is that at some point the collet got tightened (at least a little bit) WITHOUT a bit in place, so got squished (technical term—-look it up) a little beyond the 1/2” point. Should be fine now, but remember not to tighten the collet without a bit in place.

View ForestGrl's profile

ForestGrl

445 posts in 547 days


#9 posted 10-25-2015 03:43 AM



By the way, I noticed on your home page that you are in the Puget Sound area, so am I. I work in Olympia (so does my wife) but we live in a small town 30+ miles to the south out in the sticks between Centralia and Aberdeen.

- drcodfish

Some nice areas down there, I’ve shopped for a horse or two in the area, and love the coast. If you ever head north, toward Kitsap Peninsula, Port Townsend, Sequim, Bainbridge Island (where we live), and would like do a lunch, LMK. Port Townsend’s having their annual woodworking show Nov. 7-8th, haven’t been for awhile so we may head out there.

-- My mother said that anyone learning to cook needed a large dog to eat the mistakes. As a sculptor of wood I have always tried to keep a fireplace. (Norman Ridenour)

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firefighterontheside

13454 posts in 1318 days


#10 posted 10-25-2015 03:57 AM

Dr C I’m glad it worked. I started as a volunteer for my department 23 years ago and will start my 20th year full time in January. When I was younger And didn’t have kids I used to fight forest fires,out west with forest service crews from MO. My most recent fire was in Oregon in about 2006. We went out for 2 weeks at a time. It sure got bad out there this year. Made me want to get back into it. I loved it.

-- Bill M. "People change, walnut doesn't" by Gene.

View Danpaddles's profile

Danpaddles

554 posts in 1773 days


#11 posted 10-25-2015 04:19 AM

You might look at setting down some guides to keep your router where it belongs. They are not a great free hand tool.

I can see I am going to need a little more practice before I start poking holes in my maple bench top. It s not Fine Woodworking quality,

-- Dan V. in Indy

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drcodfish

119 posts in 413 days


#12 posted 10-25-2015 05:15 AM

Jerry:
This makes as much sense as any other explanation. As I mentioned I disassembled the collet at one point looking for a burr, or a bit of foreign matter but found nothing. thanks for the insight.

Dan:
I used the factory guide that came with the router today for the row of holes nearest the edge of the bench top. I am now in the process of making up a guide for the second row, they are too far inboard for the factory guide to reach. This one is the biggest router I have used, and with that 3/4” spiral upcut bit, it covers the floor with saw dust fast. I will say that soft start technology is a great feature

FG:
I went to the community college in PA years ago, then later lived in Forks. more recently I have been working with tribes on the peninsula so have spent much of the summer running around between Quinault, Neah Bay, Sequim Bay, and Port Angeles. May be working at Port Madison later this winter.

-- Dr C

View SirIrb's profile

SirIrb

1239 posts in 692 days


#13 posted 10-25-2015 02:05 PM

Wait, so you’re getting .013 difference between the collet and shank? I call bs on the collet. Take just that back if it won’t stretch. When I say stretch I mean to take the collet nut off, pull the collet out and then try to put just the collet on the bit. If that works then take it off, slide the nut on then the collet and apply to the router. Clinch down and throw chips.

-- Don't blame me, I voted for no one.

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drcodfish

119 posts in 413 days


#14 posted 10-25-2015 06:41 PM

SirIrb:

“When I say stretch I mean to take the collet nut off, pull the collet out and then try to put just the collet on the bit. If that works then take it off, slide the nut on then the collet and apply to the router. Clinch down and throw chips.”

Thanks for the tip, that’s what I did, and glad it worked because ’take it back’ for me is a time suck. I live out in the sticks so most of my shopping is done via mail order as was this new router (which I am really liking by the way).

I tried to insert a picture but was restricted: ”you can only upload files up to 5MB” I have been keeping a photo journal of this project on flickr, perhaps add these pics there and post a link.

-- Dr C

View ForestGrl's profile

ForestGrl

445 posts in 547 days


#15 posted 10-25-2015 10:43 PM


tried to insert a picture but was restricted: ”you can only upload files up to 5MB” I have been keeping a photo journal of this project on flickr, perhaps add these pics there and post a link.

- drcodfish

A 5 MB picture is huge (file-wise). Can you set your camera for lower resolution for Lumberjock pics? I use my phone camera mostly, and have it set at 800×480. That size fits well in the LJ format and file sizes are nominal. Another forum I participate in (AWW) caps the size of photos at 250kb. My digital photo editing and posting go back to the days of eBay on dial-up, where 30kb was almost too big. :-)

-- My mother said that anyone learning to cook needed a large dog to eat the mistakes. As a sculptor of wood I have always tried to keep a fireplace. (Norman Ridenour)

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