Bosch 1617EVS Spindle Play

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Forum topic by JAAune posted 10-07-2016 05:29 AM 246 views 0 times favorited 5 replies Add to Favorites Watch
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1614 posts in 1737 days

10-07-2016 05:29 AM

Anyone else with one of these routers notice significant slop in the spindle? I recently replaced my Porter Cable with one so I could upgrade to the Precision Bits collet system and seem to have lost quality of cut. After investigation I found if I grabbed the spindle in my hand and tugged it back and forth I could move it enough to see some wiggle in the chucked up bit and feel a distinct clunking as the spindle moved.

My first thought was that I’d gotten a defective unit but with the warranty already voided (superPID conversion) I ended up taking it apart and placing shims around the upper bearing. There is several thousandths of slop between the upper bearing and its housing.

Since I’ve got more of these in the shop I tested another and discovered the same issue. Now I’m thinking Bosch simply determined they could cheat on the precision because the problem won’t be noticed unless the router is subjected to heavy cutting (as a CNC will do). The Porter Cable 892 spindle is far more solid. I can’t get any detectable play out of that. Unfortunately, the collets are prone to slipping and require far more force to open than a Precision Bits collet.

There’s always the Hitachi M12 option but I’ve never owned one and am not sure how good it is. A proper spindle is not on the radar since my aluminum frame machine is already put to the limits with a standard router and a better CNC is in the future.

-- See my work at and

5 replies so far

View SuperCubber's profile


834 posts in 1705 days

#1 posted 10-07-2016 03:05 PM

I have one, but I’m on the road until Monday night. I’d be happy to check when I get home if no one else has.

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

View Bill White's profile

Bill White

4407 posts in 3381 days

#2 posted 10-07-2016 05:11 PM

Warranty or not, I’d be contacting Bosch. Something isn’t right.


View Kirk650's profile


272 posts in 169 days

#3 posted 10-07-2016 05:55 PM

I have two of them. No slop in the spindle. Great router.

View mlipps's profile


88 posts in 535 days

#4 posted 10-07-2016 11:41 PM

No slop for me. Seems something is wrong, I’d contact Bosch.

View JAAune's profile


1614 posts in 1737 days

#5 posted 10-08-2016 02:14 AM

Bear in mind that I’ve got the exact same issue with the one I just bought and one of my older ones (about 10 years old but lightly used). I’ve never noticed it with the older router after all these years until I had problems with the one on my CNC. It does take a pretty strong tug to get it to move.

I think the shims may have helped but I’ve got some worn gear racks on the CNC to replace now before I can be sure of that. Cut quality still isn’t quite there but at least I’m getting reasonable bit life now. When I first installed that Bosch, bit life dropped in half.

-- See my work at and

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