Author Topic: Size of the "truck screw" on Athearn N scale rolling stock  (Read 4473 times)

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Mark5

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I got a bunch of Athearn hoppers without trucks ... (or screws ::)) - cheap.

Anyone know the exact specs (of the truck/bolster screw)? I need a bunch and the Athearn price per unit is a bit ridiculous ($0.48 ea PN 99016)

I'm guessing they are metric thread ???

Thanks (at the moment I'm not interested in "alternatives" to the screws)

Mark
« Last Edit: May 07, 2010, 05:39:52 PM by NandW »

Bob Horn

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #1 on: May 07, 2010, 10:26:41 PM »
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It appears to be a #1 size screw, .070" dia. I just drill out the chassis for MT pins. The one I took out to measure will not rethread in to the hole so that will get the treatment. The drill size is 5/64th. Bob.

billincarmel

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #2 on: May 11, 2010, 07:13:42 PM »
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Just a suggestion, most larger hardware stores have an assortment of metric screws and nuts. Take what you have to the store and try various sizes to find out what it is. I am sure it is probably metric.
The Totally Inferior Modeler

Chris333

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #3 on: May 11, 2010, 07:30:20 PM »
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I really hate those screws!  >:(

CoalPorter

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #4 on: May 12, 2010, 11:29:18 AM »
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I really hate those screws!  >:(

Me too. I thought it was rather crude to use a giant sheel metal screw to hold the trucks on. Like a last minute bandaid fix when they couldn't figure out what to do.  ??? ???
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Robbman

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #5 on: May 12, 2010, 12:13:13 PM »
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Sheet metal screw was an epic fail... they've made up for it on newer plastic underframe cars though... they're using a proper machine screw on those

Bob Bufkin

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #6 on: May 12, 2010, 01:03:57 PM »
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While we're on the subject of Athearn.  Anyone have any short shank trucks with couplers for their overpaintede gons.  I ordered 2 from them and they sent me the long shank trucks instead. 

Mark5

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #7 on: May 12, 2010, 02:15:32 PM »
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Just a suggestion, most larger hardware stores have an assortment of metric screws and nuts. Take what you have to the store and try various sizes to find out what it is. I am sure it is probably metric.

Did that - they looked at the ones I brought with and said "wow! those are small!"

They had nothing even close.

Mark5

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #8 on: May 12, 2010, 02:16:16 PM »
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It appears to be a #1 size screw, .070" dia. I just drill out the chassis for MT pins. The one I took out to measure will not rethread in to the hole so that will get the treatment. The drill size is 5/64th. Bob.

I may end up doing this.

bbussey

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #9 on: May 13, 2010, 01:30:23 PM »
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Or, once you determine the length and thread-count of their current screws, you could get some from Small Parts or another online fastener supplier.  Doesn't Micro-Mark offer a tool to measure micro screw threads?
Bryan Busséy
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Mark5

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #10 on: May 13, 2010, 01:41:09 PM »
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Or, once you determine the length and thread-count of their current screws, you could get some from Small Parts or another online fastener supplier. 


Yeah, that's what I was kinda hoping to do.

MK

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #11 on: May 18, 2010, 10:10:53 PM »
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Mark5

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #12 on: May 20, 2010, 09:33:27 AM »
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Maybe something here will work?

http://www.microfasteners.com/catalog/products/ASTTRAIN.cfm

Thanks, but at those prices it might actually work out to be more expensive than simply buying the screws from Athearn. :o

Mark


SkipGear

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #13 on: May 20, 2010, 09:53:18 AM »
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I have dealt with Micro Fasteners alot for RC hardware. Their assortments are not the best way to go. You can buy individual screw types by the hundreds for a couple of bucks a box. They were cheap enough that when rebuilding my cars, if a screw was even remotely questionable, I threw it away and grabbed another out of my stash. I currently have just about everything 4-40 and 2-56 that they make on hand. Another good source for a cheap small screw assortment are the screw kits from a couple other RC cars.

For really small stuff, the Micro-T screw set - http://www.horizonhobby.com/Products/Default.aspx?ProdID=LOSB1524

For 1.5, 2 and 2.5mm screws, the Mini-T screw set - http://www.horizonhobby.com/Products/Default.aspx?ProdID=LOSB1047
Tony Hines

Mark5

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Re: Size of the "truck screw" on Athearn N scale rolling stock
« Reply #14 on: May 20, 2010, 09:59:14 AM »
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Maybe I can get Athearn to tell me the size and pitch, then I could simply order them by the box from somewhere eh?

Or perhaps there's a hobby shop that I could bring these to, and have them tell me the size ...  ::)

« Last Edit: May 20, 2010, 10:06:22 AM by NandW »