That really changes things, stainless on stainless can almost weld themselves together when the chromium oxide layer deteriorates, the Heli Coils are usually stainless. Nickel anti seize is a must when using stainless bolts in them.
Helicoil or Timesert
- Thread starter Zachsquatch
- Start date
One important thing to remember, is with either a Heli Coil or a Timesert, the holes have to be drilled precisely. The precise size, and at right angles to the mating surface. They also have to be tapped the same way.
You won't accomplish either with a hand drill. You'll get the angle wrong, as well as the size. Also the hole will most likely be bell mouthed. And you won't be able to control the depth properly either.
A properly drilled hole for a Heli Coil will provide a strong, long lasting repair. Most every Heli Coil repair that I have seen fail, can be traced back to an improperly drilled hole.
And forget J.B. Weld, along with all the other Mickey Mouse type of "quick and dirty" repairs. They either won't work, or won't last. Or else all of the above.
You won't accomplish either with a hand drill. You'll get the angle wrong, as well as the size. Also the hole will most likely be bell mouthed. And you won't be able to control the depth properly either.
A properly drilled hole for a Heli Coil will provide a strong, long lasting repair. Most every Heli Coil repair that I have seen fail, can be traced back to an improperly drilled hole.
And forget J.B. Weld, along with all the other Mickey Mouse type of "quick and dirty" repairs. They either won't work, or won't last. Or else all of the above.
Trav is the man, 1/4 is close also but i not metric
For anyone interested M7 bolts are easy to get. I recently had a 40mm long M6 bolt pull the thread out of aluminum, too deep for a STI helicoil tap so I ran a M6 drill bit down it to clean any roughness out then used a long M7 tap to make new threads. A solid 15 min repair that would have otherwise have been a big dismantling job to use a coil or insert.
Some M7 sources.
www.mcmaster.com
Some M7 sources.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
www.mcmaster.com
m7 8.8 bolts: Search Result | eBay
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M7-1.0 x Various Lengths Hex Head Cap Screw Bolts / Screws Assortment / Kit | eBay
Hex Head Cap Screws / Bolts. Hex / Wrench Size:11mm. Lengths:10mm 20mm 25mm 30mm 35mm 40mm 45mm 50mm 60mm & 70mm. Thread Pitch:1.0 (Coarse Thread). NOTpreviously rejected for quality issues or rescued from a scrap yard.
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