LumberJocks

Router bit movement

  • Advertise with us

« back to Hand Tools forum

Forum topic by Herkdriver posted 07-08-2019 07:08 PM 508 views 0 times favorited 17 replies Add to Favorites Watch
View Herkdriver's profile

Herkdriver

8 posts in 40 days


07-08-2019 07:08 PM

Topic tags/keywords: router router bit plunge cut

Does anyone have a tip or trick to keep a router bit from moving in the collet? I am building a worktable/out feed table and am using a Bosch 1617EV router to plunge cut a series of 3/4 inch dog holes thru 1 and 1/2 inches of plywood. I’m using a 1/2 inch shaft, 1/2 inch two flute carbide straight bit with a 3/4 inch guide bushing. I’m making shallow cuts (not plunging straight through) and I still get bit drift after two or three holes. I’m afraid to tighten the collet any more as I might deform it. I do not have an up or down spiral bit long enough to get through a 1/2 inch thick template and 1 and 1/2 inchs of table.

I have had this problem before when cutting rabbets with a rabbiting bit.

Any thoughts?

Thanks


17 replies so far

View LesB's profile

LesB

2151 posts in 3890 days


#1 posted 07-08-2019 07:21 PM

If you seat the bit shaft all the way to the bottom of the collet it can work loose because the bottom is rounded during machining. It is best to pull it back about 1/4” from the bottom. Make sure the collet is clean and free of any debris and tighten it securely.

-- Les B, Oregon

View pintodeluxe's profile

pintodeluxe

5970 posts in 3260 days


#2 posted 07-08-2019 07:45 PM

Replace the collet. It only has one job in life, and it’s not doing its job.

Also, put a micrometer on the shank of that bit. I’ve encountered undersized bit shanks from time to time.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View SMP's profile

SMP

1302 posts in 353 days


#3 posted 07-08-2019 07:51 PM

I’m kind of confused on this. You don’t have a bit capable of 2” cuts? So are you trying to get more length of cut by not inserting at least to the minimum insertion point? I’d probably just get a new bit, you can get one on amazon with 2” cut for $12.

View HokieKen's profile

HokieKen

10207 posts in 1586 days


#4 posted 07-08-2019 08:50 PM

+1 to Willy if your bit is inserted far enough. If it’s not, +1 to SMP.

Another suggestion: When I made my 3/4” dog holes in my 3” benchtop, I plunged a hole with a 3/4” bit about 1” deep then used that as a pilot for an auger bit to drill the rest of the way. You might consider that if you have a bit that will allow it.

-- Kenny, SW VA, Go Hokies!!!

View Bill_Steele's profile

Bill_Steele

536 posts in 2179 days


#5 posted 07-08-2019 09:06 PM

I think you may have a problem with either the collet, the bit you are using, or how you are installing the bit. You should not have to employ tips or tricks to get the router bit to stay firmly in the router.

As Pinto stated—check to make sure that the bit you are using has a 1/2” shaft. Maybe the one you have is slightly smaller (manufacturing defect?).

As LesB stated—do not bottom out the bit in the collet—lift it up a little so that when you are tightening the collet, the bottom of the bit is slightly above the bottom. I would definitely not recommend shallowly entering the router bit in the collect in an effort to make a deeper plunge cut—buy a longer router bit if you need to make a deep plunge cut.

Lee Valley sells a 3/4” drill bit and 3/4” bushing that might help you do this without a router (http://www.leevalley.com/us/wood/page.aspx?p=72602&cat=1,41637)

View therealSteveN's profile

therealSteveN

3353 posts in 1021 days


#6 posted 07-08-2019 10:41 PM

View CaptainKlutz's profile

CaptainKlutz

1613 posts in 1942 days


#7 posted 07-08-2019 10:41 PM

Hmm.
+1 Check the collet for burs/damage, and fix or replace it.

+1 Use proper length bit. Two inch cut depth is common on spiral bits.
https://www.whitesiderouterbits.com/products/RU5200

+1 Is bit properly positioned?
Having bit too deep inside (posted above) or not deep enough are both bad.

FWIW – If bit is too short and you extend too much out of collet it often creates vibration. Only time I have router bit shift inside collet on my several Bosch 1617 is; when there is excessive vibration in the bit. If your bit shows any extra noise (warble pitch) or it feels different as change speed of motor, then bit shaft is bent, or collet is bad.
Yes, you can bend 1/2 shaft router bits. BTDTGTTS I am a Klutz,

Cheers!

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View Herkdriver's profile

Herkdriver

8 posts in 40 days


#8 posted 07-09-2019 07:22 PM

Thanks everyone for the advice and links. After reading all your posts I figure I am trying to plunge too deep a hole with too short a bit and not having enough shaft in the collet which is brand new. I rely too much on the limited choices at Lowes and HD and lack the patience to be stalled on a project waiting for the right tool to arrive via mail. I am going to check out the Whiteside site for a couple quality spiral bits but in the mean time I got a 2 and 1/2 inch long Bosch straight bit which has a longer shaft. (at lowes) It seems to be doing the job. I’ll try to post a picture or two of the project. Nothing fancy just plywood box construction from plans by Jamison over at Rouge Engineer.

BTY. Is there a forum or page here that lists favorite vendors? Currently my knowledge base is limited to the big box stores, Rockler, Woodcraft and whatever Amazon decides to show me.

For example, where would you get full sheets of Baltic Burch plywood? My next project is a compound sliding miter saw table. After that I get to play with a couple early 1800’s era black walnut barn beams!! Kitchen table maybe…...

View CaptainKlutz's profile

CaptainKlutz

1613 posts in 1942 days


#9 posted 07-09-2019 10:49 PM


BTY. Is there a forum or page here that lists favorite vendors? Currently my knowledge base is limited to the big box stores, Rockler, Woodcraft and whatever Amazon decides to show me.

For example, where would you get full sheets of Baltic Burch plywood?

- Herkdriver

Vendors?

For me:
Which ever folks sell the good stuff cheapest (including shipping), and have some established history of tolerable customer service?
Sorry for being vague; but that is my criteria. :)

Wood sourcing varies enormously by location, as it’s too expensive to ship wood unless you buy entire truck loads at at time. Your profile doesn’t list your location, so no one can make any suggestions for BB ply in your specific area.

Tool brands are a completely different topic.

Rockler and Woodcraft are decent vendors with most of best Brands. You pay retail – pus taxes; which makes it most expensive option. But, if you need it now, they are great sources to have nearby.

Also, nothing wrong with buying stuff from HD or Lowes; but in most cases you get tools of average quality. Even the high end tools they sell, are customized models that are cost reduced to enable ‘discounted’ prices, that don’t directly compete with retail model #’s.

Best router bit discussion can go off rails in a hurry. LOL
If you need bit for a 100 bdft on one project and probably never use it again, the cheap Bosch, Ryobi, or BORG bits will work. Even the $100 super assortments will work for awhile before they get dull. :)
The cheaper bits also leave behind a surface that needs more sanding, then high quality bit
If you are building a bit collection that will get used for many years, you will want to invest in router bits with thicker and better quality carbide. There have been several magazine reviews on router bits. The Whiteside bits have always been at top of testing. Eagle America bits are made by Whiteside, with same quality. Have used all major brands, and most time I buy Whiteside bits. Really like the cut quality on Freud quad cutter bits, and buy quad cut if it exists in profile I use often.

Speaking of magazines. Wood working tools don’t change every year like consumer electronics. There are tools 1st designed in 50’s still being made/used almost exact same today! If you don’t already, Spend some time looking for magazine reviews of tools you need for shop. They are easy to find.
Suggest the Fine Woodworking archive DVD is really helpful. Retails for $100, goes on sale for much less when the new version is released. Even with reviews being decade old, they tools they tested are still sold today.

PS – You might want to subscribe to the deal thread: https://www.lumberjocks.com/topics/303346
Folks post different bargains and sales we find in our email, or online. :)

Best Luck!

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View Herkdriver's profile

Herkdriver

8 posts in 40 days


#10 posted 07-19-2019 06:34 PM

Captainklutz,

I’m in Fredericksburg, VA. Updated my profile!

Thanks for the info. I received my first Whiteside bit (inlay kit) this week. Bowties in my near future!!

The mitersaw bench I am planing to build will have 8 feet to the left of the saw and around 6 feet to the right. I’m thinking MDF for the tops unless I can find baltic burch sheets.

View Herkdriver's profile

Herkdriver

8 posts in 40 days


#11 posted 07-19-2019 06:53 PM

I promised pictures of my out feed/work table project. This is from plans by Rogue Engineer and can be found on his website or on Pinterest. I have since constructed the torsion box section that the top sits atop and have constructed the base. I’ll add pictures this weekend.

View Ocelot's profile

Ocelot

2301 posts in 3085 days


#12 posted 07-19-2019 06:53 PM

I’m not understanding why you could not make these holes with an auger bit on a drill.

Some people even do them with a brace and bit.

The WoodOwl ultra-smooth 3 flute auger bits are self-feeding and work well on a battery-powered drill. With a block of wood to square the bit (see video here), you can make nice 90-degree holes.

-Paul

View HokieKen's profile

HokieKen

10207 posts in 1586 days


#13 posted 07-19-2019 07:20 PM



...

BTY. Is there a forum or page here that lists favorite vendors? Currently my knowledge base is limited to the big box stores, Rockler, Woodcraft and whatever Amazon decides to show me.

For example, where would you get full sheets of Baltic Burch plywood? My next project is a compound sliding miter saw table. After that I get to play with a couple early 1800 s era black walnut barn beams!! Kitchen table maybe…...

- Herkdriver

My sister lives in Fredericksburg. Any time I come to visit, I make it a point to visit the Fredricksburg Workshop. It’s a sort of a makerspace but they also offer classes and have a great selection of various exotic and domestic hardwoods. Not to mention they’re super nice guys who love to talk shop :-) Last time I was there, they didn’t stock any plywood but they said they were in the process of setting up more storage area so they could increase their inventory of lumber and add plywood to their inventory. In any case, I would recommend stopping in there and just having a look around.

-- Kenny, SW VA, Go Hokies!!!

View Herkdriver's profile

Herkdriver

8 posts in 40 days


#14 posted 07-21-2019 01:16 AM

Ocelot,

I do not have a brace and bit and the veneer on the plywood I had avalable to me is very thin so I would worry about tear out. Besides I needed the practice using my router.

View Herkdriver's profile

Herkdriver

8 posts in 40 days


#15 posted 07-21-2019 01:30 AM

Hokieken

I know the place you are talking about. The local woodworker’s guild holds their monthly meeting there. Their monthly dues to use the place is a bit expensive for the amount of time I have avalble to me right now. I will be going there to look at their supply of white wood (maple, Ash?) for the base of a table I am planning to build. I will check with them for the plywood.

BTW, My youngest son will be a senior at VT this fall.

showing 1 through 15 of 17 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com