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> My 7mm Caliper bolt solution
n2j2ryan
post Feb 12 2018, 10:14 PM
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After many suggestions and a visit to a machine shop, I decided with this solution. I tapped out one end from the 7mm hole to a an 8mm thread. The other end I just bored out to 8mm. It now takes an 8mm socket head bolt, without a nut, just like the later callipers. Total cost of all bolts $12, instead of the $16 per bolt plus delivery from the UK. Attached Image
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914Sixer
post Feb 12 2018, 10:37 PM
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Looks like a working solution to me.
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Valy
post Feb 13 2018, 08:43 AM
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(IMG:style_emoticons/default/smilie_pokal.gif)
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GeorgeRud
post Feb 13 2018, 10:40 AM
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Makes you wonder why Ate chose such a strange bolt initially when producing these. Eric?
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mepstein
post Feb 13 2018, 11:19 AM
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QUOTE(GeorgeRud @ Feb 13 2018, 11:40 AM) *

Makes you wonder why Ate chose such a strange bolt initially when producing these. Eric?

I have some 7mm bolts on my '70's motorcycles. I don't think it was a strange size back in the day. Over time, things changed.
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oldie914
post Feb 13 2018, 12:11 PM
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I think Ate used the odd bolt size to keep somebody from rebuilding the calipers with the wrong (low strength) bolts. 7mm is a very strange bolt size and was probably only available from Ate. I am sure they would not sell them to everybody back then.
The calipers on my 1997 Mercedes are attached with bolts with 18mm heads. I think it has the same purpose.
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gothspeed
post Feb 13 2018, 02:37 PM
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This makes a lot of sense as the 7mm bolt holes are on the sloppy side. If you ream the holes to barely accommodate 8mm bolts, the assembly will be plenty strong. (IMG:style_emoticons/default/smile.gif)
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cwpeden
post Feb 14 2018, 11:38 AM
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Hi, I'm in Victoria too. Sorry I didn't see this sooner.

If you need any 914 help call or send me a text. I have one of the local parts hoards....including brake caliper bolts. (IMG:style_emoticons/default/sad.gif)

two5zero 8eight6 9one44
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Dave_Darling
post Feb 15 2018, 01:20 PM
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QUOTE(oldie914 @ Feb 13 2018, 10:11 AM) *

The calipers on my 1997 Mercedes are attached with bolts with 18mm heads. I think it has the same purpose.


I think it's just that newer M-B cars have transitioned to JIS-spec hardware instead of DIN-spec.

--DD
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austriafisch0
post Feb 18 2018, 08:46 AM
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Hi,

can give me somebody the specification, I will arrange a run of 1000pcs (IMG:style_emoticons/default/first.gif) java script:emoticon(':first:','smid_29')
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