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(06-25-2021, 10:07 AM)Stichill_imp Wrote: (06-22-2021, 01:57 AM)2017EX_imp Wrote: I think michael1954 has the best solution, an Allen or Torx counter sunk head screw of the correct metric size in steel. I have used stainless in a few places, but when I do, am careful to use a sparing amount of anti seize on the threads. I dont think I would use stainless in this application because not only can stainless gall, causing the fastener to seize, but also because stainless alloy has lower torque and shear specs than steel. I would be interested to see the eBay listing michael1954 used for his screws.
How much torque and shear strength does it really need to retain a cover?
Galling tends to be a problem with similar metals in contact with each other. As long as one is harder than the other, galling shouldn’t be an issue.
How much torque and shear strength does it really need to retain a cover?
Galling tends to be a problem with similar metals in contact with each other. As long as one is harder than the other, galling shouldn’t be an issue.
You are correct Sir, point taken. The Book calls for 1.1 ft-lbs on those master cylinder cap screws. None of my torque wrenches go that low. I had thought my inch pound wrench would go low enough doing the conversion, but no such luck, 1.1 ft-lbs is 13.2 inch pounds. Good and snug by hand is the result, at which point galling and shear strength are not issues as you pointed out. My bad, as my head got stuck between "in general", and this particular application.
Galling can happen between similar and dissimilar metals, but stainless titanium, and aluminum are more susceptible that others. I have ordered stainless Torx screws for my CB and Monkey as they both take the same size, M4x12. Oddly enough I could not find that size in steel. I did stumble on an interesting article on how Torx was less likely to strip out than Allen. When I install them, I will be using anti-seize sparingly on the threads, and possibly a thin film on the head taper. I have the proper JIS screw driver, but I think the Torx is a more secure solution.
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Socrates would be proud of us! Good discussion, 2017EX!
I didn't find stainless Torx so I went with hex socket / Allen. It did occur to me that one minor advantage of Allen is the ability to carry very small wrench to remove the cover on the road if necessary. But, I've never had to remove the cover on the road so that's a pretty weak argument, lol.
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(06-26-2021, 05:34 AM)Stichill_imp Wrote: Socrates would be proud of us! Good discussion, 2017EX!
I didn't find stainless Torx so I went with hex socket / Allen. It did occur to me that one minor advantage of Allen is the ability to carry very small wrench to remove the cover on the road if necessary. But, I've never had to remove the cover on the road so that's a pretty weak argument, lol.
I got mine on eBay. Most of the Torx there are the softer 304 stainless, but this listing is for 316 A4-70 stainless, I had to contact the seller to find out how many screws are included, answer 20 pieces for $6 shipped. Drop down box in the listing has several sizes, including M4x12 for this Mod. It will be coming from Taiwan/Hong Kong/China, but I am in no hurry. Fortunately I had my shop flush, bleed and install new fluid recently, so stuck OEM screws will not be an issue. Five years ago I would have done it myself, but now I don't trust my shaky hands around that caustic brake fluid, LOL.
https://www.ebay.com/itm/363222448803?ha...SwlB1f2aX4
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(06-26-2021, 06:23 AM)2017EX_imp Wrote: (06-26-2021, 05:34 AM)Stichill_imp Wrote: Socrates would be proud of us! Good discussion, 2017EX!
I didn't find stainless Torx so I went with hex socket / Allen. It did occur to me that one minor advantage of Allen is the ability to carry very small wrench to remove the cover on the road if necessary. But, I've never had to remove the cover on the road so that's a pretty weak argument, lol.
I got mine on eBay. Most of the Torx there are the softer 304 stainless, but this listing is for 316 A4-70 stainless, I had to contact the seller to find out how many screws are included, answer 20 pieces for $6 shipped. Drop down box in the listing has several sizes, including M4x12 for this Mod. It will be coming from Taiwan/Hong Kong/China, but I am in no hurry. Fortunately I had my shop flush, bleed and install new fluid recently, so stuck OEM screws will not be an issue. Five years ago I would have done it myself, but now I don't trust my shaky hands around that caustic brake fluid, LOL.
https://www.ebay.com/itm/363222448803?ha...SwlB1f2aX4
Ah, OK. I'm impatient so I always set "US Only" for the ships-from. The [url=https://www.ebay.com/itm/371734610897]grade of stainless wasn't specified so it's likely 18-8 304. I dabbed them with a bit of copper anti-seize and am good to go.
![[Image: f6aaca8b26d556fec0e3e975025bdeaa.jpg]](https://cb1100forum.net/forum/uploads/imp/202106/f6aaca8b26d556fec0e3e975025bdeaa.jpg)
![[Image: 2ee5b09d3240159ccd19f8c24024fc0e.jpg]](https://cb1100forum.net/forum/uploads/imp/202106/2ee5b09d3240159ccd19f8c24024fc0e.jpg)
![[Image: f8be5ceb24129d7cdc8d16ed65d14efe.jpg]](https://cb1100forum.net/forum/uploads/imp/202106/f8be5ceb24129d7cdc8d16ed65d14efe.jpg)
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Nice clean look, and much better than the JIS cross head IMHO..
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Agree, nice clean look 
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(06-26-2021, 10:59 AM)Stichill_imp Wrote: (06-26-2021, 06:23 AM)2017EX_imp Wrote: (06-26-2021, 05:34 AM)Stichill_imp Wrote: Socrates would be proud of us! Good discussion, 2017EX!
I didn't find stainless Torx so I went with hex socket / Allen. It did occur to me that one minor advantage of Allen is the ability to carry very small wrench to remove the cover on the road if necessary. But, I've never had to remove the cover on the road so that's a pretty weak argument, lol.
I got mine on eBay. Most of the Torx there are the softer 304 stainless, but this listing is for 316 A4-70 stainless, I had to contact the seller to find out how many screws are included, answer 20 pieces for $6 shipped. Drop down box in the listing has several sizes, including M4x12 for this Mod. It will be coming from Taiwan/Hong Kong/China, but I am in no hurry. Fortunately I had my shop flush, bleed and install new fluid recently, so stuck OEM screws will not be an issue. Five years ago I would have done it myself, but now I don't trust my shaky hands around that caustic brake fluid, LOL.
https://www.ebay.com/itm/363222448803?ha...SwlB1f2aX4
Ah, OK. I'm impatient so I always set "US Only" for the ships-from. The [url=https://www.ebay.com/itm/371734610897]grade of stainless wasn't specified so it's likely 18-8 304. I dabbed them with a bit of copper anti-seize and am good to go.
The look is clean Stichill.
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Tanks, crew. These stainless screws go well with other screws and bolts I've upgraded to stainless.
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