Rounded Torx chipper bolts !!

[b101uk]

managed to get the bloody thing out after making a groove in the head (really arkward bastard job), heating it up with a blowlamp and then whacking it constantly all evening until started to move round...and thank f@ck it did! eventually..

 

I take it you are going to throw that blade/anvil away now after you have had a blowlamp on it given that it will be heat temped HSS?

 

The easiest way to get cap-head screws out like that it to use a mig welder and a drilled hole in a piece of steel!

 

1: find/make a bit of steel about 4mm to 6mm thick and 25mm x 25mm up to 50mm x 50mm square.

 

2: drill a hole in it central to the above dimensions a little bigger than the hole in the end of the cap-head screw but smaller than the cap head, then partially countersink one side. (You may want to make 3 or 4 of the above 1st)

 

3: use the mig to fill the hole in the cap head witch also locally heats up and expands reducing tightness, build up the cap-head until it is just clear of the surrounding area then quickly grind back so its flush and shiny, then center punch to act as a guide for step 4.

 

4: get the pre-drilled piece of steel and centre the hole over the cap head with the countersink facing towards you, turn up your mig 1 power setting (with appropriate other settings) then weld the plate to the cap-head screw beneath.

 

5A: if access is ok get a spanner that will fit the metal plate and undo, (depending on your welding skill you may need to repeat steps 3 to 5A)

 

5B: if access is pore then weld (appropriately) an old socket to the metal plate then use an extension bar and ratchet in the normal way, (depending on your welding skill you may need to repeat steps 3 to 5B)

 

Doing it this way is a lot easier than trying to weld a bolt to the cap-head, it also puts more heat in to the cap-head and also has more annular area of weld actually fixed to the cap-head so normally works first time (it dose for me)

[Log-ologist]

Bad news those bolts. I did the same thing a couple of months ago. I drilled the head out. Then got the blade off followed by a bit of physical on the stub and hey presto.

 

I have recently had the feed rollers re-splined the nylon bearings re-machined and a new bottom motor for less than £ 500 inc vat .

( The motor cost £156+vat. from a hydraulics specialist , ready to fit straight in. TW want £300+ or more for the same part )

[slasherscot]

On our grinders, when a bolt on a tooth get's buggered, we use a torch to melt the head of the bolt off, takes all of 3-5 minutes, the tooth is shot afterwards.

 

Welding a nut/bolt/tool on the head also works.

 

 

[got a few undone with hammer and punch

[igottacabstar]

On our grinders, when a bolt on a tooth get's buggered, we use a torch to melt the head of the bolt off, takes all of 3-5 minutes, the tooth is shot afterwards.

 

Welding a nut/bolt/tool on the head also works.

 

 

[got a few undone with hammer and punch

 

When I had a Timberwolf this problem occured regularly. I always found a hammer and punch the best way to do it, just remember that the punch has to be made of harder steel than the bolt and it needs to have a small point on the end of it to really dig in.

[treediver]

Why on earth did entec decided to use torx bolts for their blades?

- their a pain to pick out all the bits which get compacted in

 

- the heads on them are obviously prone to being stripped..or at least easily damaged.

 

Im gonna change all mine to hex if i can find any.

[Log-ologist]

Saturn Machine's bolts have a hex head, they even sent me the correct allen key with the order.

[Husqvarna King]

A good tip i learnt when working with agricultural machinery was to heat a stuck bolt like that and then immediately throw cold water over it...it sort of cracks the seal...also stud extractors are good...but its always easier to use new bolts on chippers and copper grease...saves time and money in the long run

[Dean Lofthouse]

If none of that works, what I do is put the torx key or allen key into the rounded hole then tack weld it and the heat will transfer and then you have a solid lever to undo the bolt.

[TREELINE]

done the same myself with impact driver though. best advice use two guys and hand tools. one to push hard one to turn. no probs since.

[GLOBALOFFROAD]

Hi everybody, as a company we don't normally get involved in posts,but it would seem people are getting in a pickle over the correct way to fit bolts and remove stubborn ones from Timberwolf chippers.

 

As an independant Timberwolf specialist we have many many years of combined knowledge and have learnt many tricks to keep Timberwolf chippers on the road,anybody who knows us will tell you that this knowledge is only a phone call away and is free!!!

 

We also stock 7mm cap head blade bolts and can also supply the correct socket along with a pick to clean the muck out.

 

Feel free to ring us if you have any problems we will allways try to help, or pop in for a coffee and chat at our showrooms.

 

Global Sales Ltd

Unit S/2 Olton Wharf.

Richmond Road.

Solihull.

West Mids

B92 7RN

 

Please Telephone 0121 7068617

 

http://www.getitatglobal.co.uk