HP Products Steam Locomotive Bolts

HP Products Steam Locomotive Bolts

Postby AstroGoat760 » Thu Oct 29, 2015 6:22 pm

I need to reattach the main rod on a pair of my HP Steam fleet (a 0-6-0 and a 4-4-2). I need to find out what size bolts were used on the connecting rods so that I can get a proper sized hex driver.

Does anyone have any information/advice that would be of help?
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Re: HP Products Steam Locomotive Bolts

Postby richardedmonds » Thu Oct 29, 2015 6:35 pm

Hi Angry I am pretty sure they are 0-80 somebody will correct me if that's wrong micromark do a set I beleive
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Re: HP Products Steam Locomotive Bolts

Postby areibel » Thu Oct 29, 2015 7:05 pm

Or here-
https://www.microfasteners.com/home.php?cat=575
A lot cheaper than Micromark!
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Re: HP Products Steam Locomotive Bolts

Postby gerhard_k » Fri Oct 30, 2015 5:59 pm

AngrySailor302 wrote:I need to reattach the main rod on a pair of my HP Steam fleet (a 0-6-0 and a 4-4-2). I need to find out what size bolts were used on the connecting rods so that I can get a proper sized hex driver.


I take it you *have* the rod bolts and just need the correct wrench or nut driver, right? If not, remember that these bolts must not be threaded full-length, but need an unthreaded portion (shoulder) to engage the rods, for minimum play and wear.

I miked the 4 most accessible bolts on my HP 2-8-0. 3 of them came in 0.095-0.096 inches, which would be 3/32" in fractional terms, or 2.4mm. But one is just 0.086 (2.2mm), so a 3/32 nut driver would be loose on that one and might round off the corners. With such a problem, I might consider making a custom wrench by needle-filing a slot in a thin piece of steel sheet. :crazy:

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Re: HP Products Steam Locomotive Bolts

Postby AstroGoat760 » Fri Oct 30, 2015 7:04 pm

Well, I ordered a 4 pack of hex drivers from Walthers sizes 00, 0, 1, and 2. I hope that one of them will work out.

I guess some clarification is needed: I do not need to get more bolts, I just need to be able to properly tighten them without rounding them off.
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Re: HP Products Steam Locomotive Bolts

Postby areibel » Fri Oct 30, 2015 7:53 pm

I just use an Allen head cap screw from the hardware store. Find the right size and buy a half dozen nuts, then lock tite it all together. I had to make several since things seem to vanish from the workbench down in the dungeon.
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Re: HP Products Steam Locomotive Bolts

Postby tomvanhoy » Fri Oct 30, 2015 8:41 pm

I got a 3/32 nut driver at the local hobby shop. It was in the section for RC airplanes.
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Re: HP Products Steam Locomotive Bolts

Postby AstroGoat760 » Fri Oct 30, 2015 8:44 pm

areibel wrote:I just use an Allen head cap screw from the hardware store. Find the right size and buy a half dozen nuts, then lock tite it all together. I had to make several since things seem to vanish from the workbench down in the dungeon.


I never thought about doing that, I will give it a try if the hex wrenches turn out to not be the right size.
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Re: HP Products Steam Locomotive Bolts

Postby areibel » Fri Oct 30, 2015 9:37 pm

I can't take credit for the idea, it actually came from a old HO friend. Back when they would use a screw head to fasten the rods on, he would use small hex heads to replace them and he told me his secret. I think I've got about five bucks in four of them.
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Re: HP Products Steam Locomotive Bolts

Postby AstroGoat760 » Fri Nov 06, 2015 7:30 pm

Problem solved: the 4 pack of wrenches came in today, and the size 0 wrench did the trick.
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