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Stripped Bolt Removal

 

Hi Guys,

The bolt on my K940 to replace my blade seems to be stripped. I’ve tried using a different hex Allen wrench with no luck. How would you guys go about removing this?

Thanks
 

Hi,

Not sure what to suggest if it is completely stripped, but I just want to make sure you are trying to turn it clockwise (opposite from the usual loosening turn). Sorry if this is obvious.

My brand new saw actually shipped with an almost stripped hex nut a few months ago (I guess Felder striped it themselves during test runs). I find the implementation of this bolt utterly ineffective since it could certainly stick out a touch in order to get a different grip on it once it has stripped? Or some stronger material?

I am definitely hoping for someone with a good answer as to how this bolt can be removed, as mine is bound to be fully stripped after only a few more blade changes? ....

Cornelius Schultze-Kraft?
Cyprus
 

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I’d find out what size the bolt is, make sure it’s left hand or right hand thread, and then start drilling down the center of it with slightly larger drill bits until the drill pops the head off the bolt. At that point the large washer should come off exposing enough of the bolt to grab with vise grips and remove.?

Either replace with the factory replacement, or, stack a thick washer into the hole and use a hex head bolt that would protrude enough to use a normal hex wrench to remove.

Before I did all of that I’d contact Felder and see what their solution is, after all a new machine is under warranty.

Brian Lamb
blamb11@...
www.lambtoolworks.com




On May 6, 2024, at 9:44?AM, Cornelius <Cornelius@...> wrote:

Hi,

Not sure what to suggest if it is completely stripped, but I just want to make sure you are trying to turn it clockwise (opposite from the usual loosening turn). Sorry if this is obvious.

My brand new saw actually shipped with an almost stripped hex nut a few months ago (I guess Felder striped it themselves during test runs). I find the implementation of this bolt utterly ineffective since it could certainly stick out a touch in order to get a different grip on it once it has stripped? Or some stronger material?

I am definitely hoping for someone with a good answer as to how this bolt can be removed, as mine is bound to be fully stripped after only a few more blade changes? ....

Cornelius Schultze-Kraft?
Cyprus
 

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Brian,

If it can be drilled then would screw extractor work? They make them for both right and left hand threads.

FWIW, I did order a replacement bolt for K975 after buying it used with a buggured up bolt. I was afraid, I will be in this situation.

Imran Malik

On May 8, 2024, at 4:08?PM, Brian Lamb via groups.io <blamb11@...> wrote:

?I’d find out what size the bolt is, make sure it’s left hand or right hand thread, and then start drilling down the center of it with slightly larger drill bits until the drill pops the head off the bolt. At that point the large washer should come off exposing enough of the bolt to grab with vise grips and remove.?

Either replace with the factory replacement, or, stack a thick washer into the hole and use a hex head bolt that would protrude enough to use a normal hex wrench to remove.

Before I did all of that I’d contact Felder and see what their solution is, after all a new machine is under warranty.

Brian Lamb
blamb11@...
www.lambtoolworks.com




On May 6, 2024, at 9:44?AM, Cornelius <Cornelius@...> wrote:

Hi,

Not sure what to suggest if it is completely stripped, but I just want to make sure you are trying to turn it clockwise (opposite from the usual loosening turn). Sorry if this is obvious.

My brand new saw actually shipped with an almost stripped hex nut a few months ago (I guess Felder striped it themselves during test runs). I find the implementation of this bolt utterly ineffective since it could certainly stick out a touch in order to get a different grip on it once it has stripped? Or some stronger material?

I am definitely hoping for someone with a good answer as to how this bolt can be removed, as mine is bound to be fully stripped after only a few more blade changes? ....

Cornelius Schultze-Kraft?
Cyprus
 
Edited

On Mon, May 6, 2024 at 05:27 PM, <jppetricca@...> wrote:
How would you guys go about removing this?
I would first try to drill the head off, but if either access or hardness preclude that I'd try to weld something onto the head of the damaged bolt. Another option is to use a die grinder to remove the head.?
I don't know anything about the K940 but, if necessary, it must be possible to remove the spindle assembly from the machine so that it's easier to work on.
If all else fails, accept that you need to sacrifice the retaining washer and use an angle grinder with a cutting disc.

Dave
 

MyK700 pro bolt definitely turns counterclockwise to loosen. Did Felder change that over the years? I always clean any sawdust out before I loosen or tighten.
Philip Davidson

--
Philip
davidsonukuleles.com
 

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A screw extractor would work, but they tend to be hard and some times brittle…. If you bust that off in there, you are up the proverbial creek.?

Nothing would be fun…. I would try to stay away from welding, tough to get in there and who knows what the heat might do to the bearings. If the stock bolt is so easily deformed and stripped, I suspect drilling it out with successively larger drills until the head pops off is going to be the best solution, you don’t have to drill deep, just the thickness plus a little of the head… at least that is the direction I would start with.

An angle grinder would be an option as well, grind the head off and destroy the large flange washer as well, which can be replaced. You would end up with a crap ton of metal and abrasive grit in the machine though, maybe proper masking off would help.

I would want to know what thread it is, right or left handed…. And yes, there are machines out there both ways, my KF700 had a right hand thread. I can’t say for certain which machines are right vs. left, so proceed with caution, or the knowledge before hand from either Felder or someone with your exact machine.

Brian Lamb
blamb11@...
www.lambtoolworks.com




On May 8, 2024, at 3:27?PM, Philip Davidson <pgdiv4@...> wrote:

MyK700 pro bolt definitely turns counterclockwise to loosen. ?Did Felder change that over the years? ?I always clean any sawdust out before I loosen or tighten. ?
Philip Davidson

--
Philip
davidsonukuleles.com
 
Edited

Another option you might want to try is to take an Allen key and try to glue it with epoxy to the stripped bolt.

Not sure if epoxy would be strong enough to hold the Allen key when you apply pressure.

?

If that doesn't work I would try to use an angle grinder to slot the screw. so you can use a large flat head screwdriver to apply the pressure on the bolt
 

If your Allen wrench still fits use clover valve grinding compound on the tool to help grip against the worn area of the cap screw. Use the compound with the rough grit to pack on the tool. Hope this helps.

Aloha, Ryan
 

(Disclaimer: I’ve never used a Felder slider)?

Is there room in there to get an hand impact driver (ie: Lisle 29200)? With it you drive the bit into the screw head when you hit with the hammer and turn at the same time. They usually work for even the most stubborn of screws that are partially stripped. ?

Jim

On Wed, May 8, 2024 at 7:06?PM netanel.belgazal via <netanel.belgazal=[email protected]> wrote:

[Edited Message Follows]

Another option you might want to try is to take an Allen key and try to glue it with epoxy to the stripped bolt.

Not sure if epoxy would be strong enough to hold the Allen key when you apply pressure.

?

If that doesn't work I would try to use an angle grinder to slot the screw. so you can use a large flat head screwdriver to apply the pressure on the bolt
 

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I don’t know if I’d want to pound on the spindle bearings… but along those lines a good impact driver or air impact with a hex bit and the clover lapping compound might do the trick. That way you get a good rotational hit but not into the spindle axis and hammer the bearings. Just need to know which direction to turn first….

Brian Lamb
blamb11@...
www.lambtoolworks.com




On May 8, 2024, at 11:11?PM, Jim Dayton <jd74914@...> wrote:

(Disclaimer: I’ve never used a Felder slider)?

Is there room in there to get an hand impact driver (ie: Lisle 29200)? With it you drive the bit into the screw head when you hit with the hammer and turn at the same time. They usually work for even the most stubborn of screws that are partially stripped. ?

Jim

On Wed, May 8, 2024 at 7:06?PM netanel.belgazal via <netanel.belgazal=[email protected]> wrote:

[Edited Message Follows]

Another option you might want to try is to take an Allen key and try to glue it with epoxy to the stripped bolt.

Not sure if epoxy would be strong enough to hold the Allen key when you apply pressure.

?

If that doesn't work I would try to use an angle grinder to slot the screw. so you can use a large flat head screwdriver to apply the pressure on the bolt
 

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All this talk and my luck.?There were 2 of these attaching the handle to the vacuum cleaner base. First screw came off with a bit of hesitation. Second one, snapped the end of the T-25 bit. Thought it was old. 2nd bit took off the lobes and rounded the head.?Luckily screw extractor worked. It was the softest screw I have ever drilled.

image0.jpeg

Imran Malik

On May 9, 2024, at 10:01?AM, Brian Lamb via groups.io <blamb11@...> wrote:

?I don’t know if I’d want to pound on the spindle bearings… but along those lines a good impact driver or air impact with a hex bit and the clover lapping compound might do the trick. That way you get a good rotational hit but not into the spindle axis and hammer the bearings. Just need to know which direction to turn first….

Brian Lamb
blamb11@...
www.lambtoolworks.com




On May 8, 2024, at 11:11?PM, Jim Dayton <jd74914@...> wrote:

(Disclaimer: I’ve never used a Felder slider)?

Is there room in there to get an hand impact driver (ie: Lisle 29200)? With it you drive the bit into the screw head when you hit with the hammer and turn at the same time. They usually work for even the most stubborn of screws that are partially stripped. ?

Jim

On Wed, May 8, 2024 at 7:06?PM netanel.belgazal via <netanel.belgazal=[email protected]> wrote:

[Edited Message Follows]

Another option you might want to try is to take an Allen key and try to glue it with epoxy to the stripped bolt.

Not sure if epoxy would be strong enough to hold the Allen key when you apply pressure.

?

If that doesn't work I would try to use an angle grinder to slot the screw. so you can use a large flat head screwdriver to apply the pressure on the bolt

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