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There are 4 hex head bolts at the bottom of the fork tube for tightening the front axle. I was sizing these bolts to buy hex socket bits for my new torque wrench. Well the specs say these bolts are 8mm. To verify size, I put 8mm allen wrench in the bolt head and it is a wobbly fit (like someone rounded out the head with a sae size). Tried aother 8mm wrench ... same problem. Inside of head looks ok so I am baffled. Have any other CB1100 owners encountered this?
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(11-25-2020, 05:35 AM)bflint_imp Wrote: There are 4 hex head bolts at the bottom of the fork tube for tightening the front axle. I was sizing these bolts to buy hex socket bits for my new torque wrench. Well the specs say these bolts are 8mm. To verify size, I put 8mm allen wrench in the bolt head and it is a wobbly fit (like someone rounded out the head with a sae size). Tried aother 8mm wrench ... same problem. Inside of head looks ok so I am baffled. Have any other CB1100 owners encountered this?
The bolts are 8mm but the Allen hex size is 6mm. Fit may be different depending on tool quality, but there is a little sloppiness. This is a bolt I would not use an impact on because it tends to loosen the fit up more.
When the fit is loose, I put a piece of paper over the hole and push the hex bit in. It does take up enough slack to reduce rounding and damage.
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The bolts may be 8mm, but the allen size is 6mm. Yeah, there is a little play. They aren’t torqued much. around 16 ftlbs IIRC. I’d have to check to be sure
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Thanks for the feedback. Your right about the 6mm, I misread the index marking on the plastic holder (6 looked like 8) on my Craftsman set. Wonder if there are JIS allen wrenches and sockets? Will look.
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It is also nice to get a set of "rounded" hex head allen keys for less easy to get allen bolts , I think they work up to 15 degree .
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Found JIS quality version of allen (hexagonal) wrenches from Japanese company named "Eight". Quote from their web site: "Specifications of EIGHT brand Hexagon wrenches exceed the requirements of ISO, JIS, and Federal standard". Bought "EIGHT Extra Long Taper Head Hex Key Set, TLS-9NX" from frankstools.com. Will see if the fit is any different than my Craftsmen
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Still waiting for my "JIS" Hex Key set. Decided to borrow my neighbors micrometer calipers to measure the offending Craftsman 6MM tool ... ouch, it was 5.1MM. The other in the see were close to what they should be but WOW ... choice of tool mfgr does make a difference. Can't afford SnapOn but at least some non-China stuff is in my future.
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(11-30-2020, 08:02 AM)bflint_imp Wrote: Still waiting for my "JIS" Hex Key set. Decided to borrow my neighbors micrometer calipers to measure the offending Craftsman 6MM tool ... ouch, it was 5.1MM. The other in the see were close to what they should be but WOW ... choice of tool mfgr does make a difference. Can't afford SnapOn but at least some non-China stuff is in my future.
Wow! 5.1mm is very loose. I measured several of mine, and even one from an old Honda tool kit was 5.9 mm. Craftsman used to be such a respected name in tools.
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(11-30-2020, 08:02 AM)bflint_imp Wrote: Still waiting for my "JIS" Hex Key set. Decided to borrow my neighbors micrometer calipers to measure the offending Craftsman 6MM tool ... ouch, it was 5.1MM. The other in the see were close to what they should be but WOW ... choice of tool mfgr does make a difference. Can't afford SnapOn but at least some non-China stuff is in my future.
5.1!!! that's nuts! (or bolts
It should be 6mm (+0/-0.04), so anything between 5.96mm and 6mm.
And the socket head should be 6 (+0.02 / +0.14) (so anything between 6.02mm and 6.14mm.
The tightest combination, 6 key into 6.02 socket (0.02mm clearance)
The loosest comnbination, 5.96 key into 6.14 socket (0.18mm clearance)
