FAQs

On this page you will find answers to some of the more frequently questions we get about our products and other related topics.

• What tyre profiles are used for the wheels your produce
• What does 'OO' Fine scale, E.M. and 18.83 mean
• What is 'OO' Fine scale
• What tyre profile comes closest to the RP25 standard
• What gauge corresponds to the HO (16.5mm) track gauge
• What materials are used in the contsruction of your wheels
• Can your wheels be machined/modified by the modeller
• What do your recommend to fix your wheels to the axles
• Can you make a conversion pack suit another gauge just by changing the axles
• Do any of the gears you manufacture mesh with the final drive gears on the Portescap gear boxes
• Do you do assembly instructions for your conversion packs
• Can you use a quartering fixture/jig on your wheels


What tyre profiles are used for the wheels your produce?

The 'OO'/E.M. profile used is the one developed by Brian Rogers and Guy Williams for use on Pendon, which was later adopted by the E.M.G.S. The 18.83 profile is a scaled down version of the prototype P1 form.

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What does 'OO' Fine scale, E.M. and 18.83 mean?

This refers to the track gauge which each can be used on. The track gauge for each are as follows: 'OO' Fine scale=16.5mm, E.M.=18.2mm and 18.83=18.83mm.

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What is 'OO' Fine scale?

'OO' Fine scale is the standard to which we manufacture our 'OO' wheel sets. These sets use the same track gauge as 'OO' (16.5mm) together with our 'OO'/E.M. wheel profile. This means that they are not suitable for out of the box 'set track' and should only be used for fine scale track work like Peco code 75 and code 100 as well as other fine scale track.

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What tyre profile comes closest to the RP25 standard?

The nearest is our 'OO'/E.M. profile, which is close to the RP25/88 specification.

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What gauge corresponds to the HO (16.5mm) track gauge?

Our 'OO' Fine scale wheels sets have the same track gauge (16.5mm) as HO.

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What materials are used in the contsruction of your wheels?

Manufactured from either Nickel Silver or Brass and the centres are injection moulded Nylatron GS.

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Can your wheels be machined/modified by the modeller?

We do not recommend that any machining or modifications are made to any of the wheels we supply, as this could cause irreparable damage to them.

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What do your recommend to fix your wheels to the axles?

For final assembly, we recommend the use of Loctite 601 or 603 retainer.

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Can you make a conversion pack suit another gauge just by changing the axles?

No, if you only change the axles, the drive gear position will no longer be correct and the clearance between the back of the wheels and the bogie will also be wrong.

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Do any of the gears you manufacture mesh with the final drive gears on the Portescap gear boxes?

Yes, our 100DP fine pitch spur gear range will mesh with both the RG4 and RG7 final drive gears.

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Do you do assembly instructions for your conversion packs?

In all the time we have been making conversions, we have not found it necessary to supply detailed assembly instructions. We do have simple data sheets for some of the conversions (i.e. the Bachmann 3F 'Jinty' for example) and these can be found in the products section with the conversion or on the dowloads page. Please note that not all currently available conversion have a data sheet.

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Can you use a quartering fixture/jig on your wheels?

You can, but we DO NOT recommend the use of a quartering fixture/jig on our products as this can damage the wheels.

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