helicoil and drillout costs?

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Tramp
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helicoil and drillout costs?

Post by Tramp » Sun Nov 26, 2017 12:39 pm

okay....the ccm started but pucked oil :lol: ..so restripped down and two snapped bolts in the barrel :o ....need a drill out and heliciol into alloy...m6 bolt threads std ...

so what are the likely costs if i hand over the barrel to a enginerring workshop......ive only got a variable speed house drill so maybe time for the experts :D ...the snapped bolts are flush with top of Barrel about 5mm deep.

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herman
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Re: helicoil and drillout costs?

Post by herman » Sun Nov 26, 2017 12:57 pm

Might be worth a call? local too. http://www.threadfix.co.uk/Thread_Fix/Welcome.html
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Billy Bananahead
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Re: helicoil and drillout costs?

Post by Billy Bananahead » Sun Nov 26, 2017 1:02 pm

Can you weld?

Weld nuts onto what's left of the studs and undo the bolts from the head that way.

Drilling into steel bolts can be a bit dodgy if the drill slips or the bit snaps off.

Richard Simpson Mark II
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Re: helicoil and drillout costs?

Post by Richard Simpson Mark II » Sun Nov 26, 2017 1:02 pm

Sorry to hear that...

I've just had an excellent result using a Clarke rethread kit on my Pampera (buy from Machine Mart or on line, you only need buy the thread, tap and drill for the fastener you are replacing).

https://www.clarketooling.co.uk/tools/T ... _Kits.html

The big challenge will be to drill the holes cleanly and accurately. Do you know anyone with a pillar drill?


Good luck

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zimtim
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Re: helicoil and drillout costs?

Post by zimtim » Sun Nov 26, 2017 1:17 pm

An old pallet from work free
2litres petrol £2.30
Box of matches £0.1
Problem solved
Have a nice warm, toast some marshmallow
Get a new bike







Hope you get it sorted soon
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Tramp
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Re: helicoil and drillout costs?

Post by Tramp » Sun Nov 26, 2017 2:37 pm

Thanks Herman....iv cdropped the guy a email as local to me ....as i said bolts ares are flush in barrel...

Cheers Richard....may come to a home fix yet but always worth trying the pros first ....cheaper tham a replacement Engine barrel...

ZIMTIM.....Ddrown the black pig next tine up tge plain and dont forget your arm bands.. :D

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Re: helicoil and drillout costs?

Post by redbikejohn » Sun Nov 26, 2017 3:50 pm

Just because they're snapped does not mean you have to rethread. Drill them out. Start by pock marking the bolt using a centre punch right in the middle of the snapped bolt. Then using a fairly small drill carefully drill through the bolt. Go up a size in drill and do again. Continue until you have almost got all the bolt out. If you are lucky the hole with be central but if it's not then stop before you get to thread of barrel. You should now be able to tap out the remaining bit of bolt. Once most of it is drilled out it deemed to lose it's grip on the main object and taps out easy.
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zimtim
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Re: helicoil and drillout costs?

Post by zimtim » Sun Nov 26, 2017 4:08 pm

Won't easy out work.
You don't have to be precise with first drill just deep enough to get the easy out bits to bite in.

Black pig, arm bands and wetsuit all ready for next Sunday :geek: :D :D :D :evil:
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Re: helicoil and drillout costs?

Post by Richard Simpson Mark II » Sun Nov 26, 2017 5:04 pm

I've never got an easy-out to work...screwing them in seems to force the stud to expand and wedge itself tighter into the female hole (sorry, that sounds a bit rude :oops: )

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Re: helicoil and drillout costs?

Post by RichardM » Sun Nov 26, 2017 6:08 pm

I'm with Billy, weld some nuts on the ends , let them cool, penetrating oil and they usually come out easily.

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