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HO code 88 wheels
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Folks,
With my prior stock of Rapido HO code 88 wheelsets exhausted, and no sign of those sets being restocked, or of my favorite Reboxx ever being made again, what are y'all using for replacement wheel sets with 1.020 or thereabouts axle lengths?
Intermountain and Tangent are 1.004" axles so too short for most trucks, except Tangent and IM and ExactRail are even shorter at 1.002".
Regards,
Bruce
Bruce Smith
Auburn, Al
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Terry Link
Rapido code 88 wheelsets are back
in stock - they shipped out 12 packs and 100 packs a couple
weeks ago.
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On 12/31/2021 15:54, Bruce Smith wrote:
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Eric Hansmann
FYI, here are HO scale axle lengths I've gathered from friends and internet sources. I also measured a few with calipers.
Arrowhead 33-inch diameter code 88 - 1.000 inches
Intermountain 33-inch diameter code 88 - 1.005 inches
Kadee 33-inch diameter code 88 - 1.019 inches
Moloco 33-inch diameter code 88 - 1.005 inches
Rapido 33-inch diameter code 88 - 1.015 inches
Tangent 33-inch diameter code 88 - 1.008 inches
Northwest Shortline code 88 wheel sets with 33" and 36" wheels come in three axle lengths, .944", 1.015", and 1.025". The .944" works well in Atlas trucks.
I just used installed Tangent wheelsets in Accurail sideframes. The fit seems good.
Eric Hansmann
Murfreesboro, TN
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Andy Miller
Bruce, My club has about 500 cars equipped with Accurail or Bowser rigid truck frames fitted with I/M .0888 wheels. It became our de facto standard several years ago. We have had no problems with them over those several years.
Regards,
Andy Miller Northshore Model RR Club
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> On Behalf Of Bruce Smith
Sent: Friday, December 31, 2021 3:54 PM To: STMFC <RealSTMFC@groups.io> Subject: [RealSTMFC] HO code 88 wheels
Folks,
With my prior stock of Rapido HO code 88 wheelsets exhausted, and no sign of those sets being restocked, or of my favorite Reboxx ever being made again, what are y'all using for replacement wheel sets with 1.020 or thereabouts axle lengths?
Intermountain and Tangent are 1.004" axles so too short for most trucks, except Tangent and IM and ExactRail are even shorter at 1.002".
Regards, Bruce Bruce Smith Auburn, Al
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gary laakso
For both the NP Rapido boxcars, all 16 of them, and their USRA DS boxcars, factory wheelsets were replaced with Intermountain 0.88 wheels.
Gary Laakso Northwest of Mike Brock
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> On Behalf Of Bruce Smith
Sent: Friday, December 31, 2021 3:54 PM To: STMFC <RealSTMFC@groups.io> Subject: [RealSTMFC] HO code 88 wheels
Folks,
With my prior stock of Rapido HO code 88 wheelsets exhausted, and no sign of those sets being restocked, or of my favorite Reboxx ever being made again, what are y'all using for replacement wheel sets with 1.020 or thereabouts axle lengths?
Intermountain and Tangent are 1.004" axles so too short for most trucks, except Tangent and IM and ExactRail are even shorter at 1.002".
Regards, Bruce Bruce Smith Auburn, Al
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I used the new Moloco 33-inch diameter code 88 wheels in Tichy Andrews trucks for the SP&S 40 ft. flat car project and they rotate very well and are not loose.
Ken Adams Still in splendid Shelter In Place solitude, about half way up Walnut Creek Owner PlasticFreightCarBuilders@groups.io |
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Ken,
Unfortunately, the Moloco axle length is 1.005" which is pretty much useless for most of the axle needs I have (lots of Bowser, which needs 1.020 to 1.035" axles so as not to be too sloppy).
Regards,
Bruce Smith
Auburn, AL From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> on behalf of Ken Adams <smadanek44g@...>
Sent: Saturday, January 1, 2022 2:12 PM To: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> Subject: [EXT] Re: [RealSTMFC] HO code 88 wheels
Ken Adams Still in splendid Shelter In Place solitude, about half way up Walnut Creek Owner PlasticFreightCarBuilders@groups.io |
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I’m with you Bruce, I need about 100 1.035 for Bowser Crown trucks.
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Brian J. Carlson On Jan 1, 2022, at 3:19 PM, Bruce Smith <smithbf@...> wrote:
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Brian J. Carlson, P.E. Cheektowaga NY |
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Bruce, Brian,
I only said the Moloco 1.005" length axel wheels worked in the Tichy Andrews trucks. I realize there is no common standard let alone a recommended practice for axel length amongst maker of North American HO freight (or passenger?) trucks. Is there a Proto87 standard? In my UK prototype modeling, 4 mm scale brass cone and hat style wheel bearing inserts for pointed axels are available and are required for many goods wagon kits. The axel length was variable according to the modeling track gauge standard the modeler follows (OO, EM or P4.) I have had no reason yet to test the UK inserts on any of my NA models to correct axel length issues. I usually use Tahoe trucks (omitted from the table above but I understand they use IM wheelsets) when the prototype being modeled is available in the Tahoe line and they come with the choice of .110 and .088 wheelsets. Having the Tichy Andrews trucks (which are very nice moldings) on hand with a pack of Moloco wheels purchased to try them out was a fluke. -- Ken Adams Still in splendid Shelter In Place solitude, about half way up Walnut Creek Owner PlasticFreightCarBuilders@groups.io |
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Kenneth Montero
While NMRA does have standards for most parts of a wheelset (Standard S-4.1, S-4.2, and S-4.3, go to
https://www.nmra.org/index-nmra-standards-and-recommended-practices ), those standards do not include axles.
NMRA does have a recommended practice for axles: RP 24.3. Here is a link to that RP: https://www.nmra.org/sites/default/files/standards/sandrp/pdf/rp-24.3.pdf
Ken Montero
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Dennis Storzek <dennis@...>
On Sun, Jan 2, 2022 at 10:43 AM, Kenneth Montero wrote:
NMRA does have a recommended practice for axles: RP 24.3. Here is a link to that RP: https://www.nmra.org/sites/default/files/standards/sandrp/pdf/rp-24.3.pdfThe NMRA RP-24, like most NMRA recommendations, bears no relationship to the prototype and, while revised in 1982, was already generally ignored by the time I did a survey of available freight trucks in 1993 as I designed Accurail's truck mold. At that time the majority of available "one piece" HO scale freight trucks clustered around 1.010" to 1.015 long; only Athearn was still using the long 1.035" axle on their "blue box" kits. The problem was most manufactures had abandoned the self gauging stepped axles, instead bringing the 3/32" diameter all the way through the wheel, as Athearn did. This limited the depth of the bearing cone in the molded sideframe, since 3/32" is over 8 scale inches and wider than most steam era journal boxes. The easy fix for this is to spread the sideframes out, making the truck overly wide. I initially designed the Accurail trucks to be scale width and use 1.010" long axles, and had endless complaints because the common metal replacement wheelsets of the day all had axles between .002" to .005" longer. I eventually revised the tooling, letting the bearing cone slightly break out of the side of the journal boxes, and the complaints stopped. I am, however, glad to see more manufacturers completely abandon the outdated RP-24 dimension. Dennis Storzek |
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Thank you Dennis
It would not be a problem but for the unreliability of the supplies of HO metal wheelsets from any given manufacturer due to extended supply chains. This supply chain unreliability makes interoperability of wheelsets with the different manufacturers of trucks needed for a specific model. I expect there is no easy resolution to this issue in the near future just as there is no easy resolution to the larger world's supply chain problems. Note that the referenced NMRA RP only specifies a max length of 1.035 inches to cover Athearn which was still the major HO manufacturer of freight cars in 1982. Alan Gibson Workshop in the UK (http://www.alangibsonworkshop.com/) still lists Pin Point Brass Axel Bearings in their last catalog (2018) if the available axels do not fit the freight truck you absolutely have to use. Keep your calipers handy. -- Ken Adams Still in splendid Shelter In Place solitude, about half way up Walnut Creek Owner PlasticFreightCarBuilders@groups.io |
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Allen Cain
Eric,
Thanks for the wheelset dimensions. Do you happen to have corresponding data on various truck sideframes? -- Allen Cain Modeling the Southern in 1955 in HO Scale |
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Eric Hansmann
I do not have that data, Allen. Dennis Storzek posted info on the Accurail truck tooling. IIRC, Brian Leppert tooled the Tahoe Model Works trucks to fit the Intermountain axles.
Eric Hansmann Murfreesboro, TN
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> On Behalf Of Allen Cain
Sent: Monday, January 3, 2022 8:46 AM To: main@RealSTMFC.groups.io Subject: Re: [RealSTMFC] HO code 88 wheels
Eric, |
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Has the spelling of the word “axle” been changed to “axel” in US dictionarys?
Andy Andy Jackson Santa Fe Springs CA |
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charlie9
Only if you are figure skating.
Charlie |
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As the owner of that mistake, I offer my apology. My only defense is to twirl on the excuse that I was a casualty of phonetic spelling in my 1950's primary school instruction.
-- Ken Adams Still in splendid Shelter In Place solitude, about half way up Walnut Creek Owner PlasticFreightCarBuilders@groups.io |
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