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Delivery Time

Our current delivery on production items can be up to
6 months
from receipt of order.

Orders in Progress

The following orders are currently being processed.

09/03/2015 to 20/03/2015
UO1680 to UO1700

Please note that orders currently in progress can take between 4 to 5 weeks to complete.

The above orders are listed by date received and order number.

The above orders can now no longer be changed.

Last Updated

The following sections of the web site have been updated resently.

• Home 20/08/2015
• Notice Board 20/08/2015
• Home Page Story 20/08/2015

Display Cabinet

software development and consultancy

Click here to visit the FSB homepage


Welcome to the Ultrascale Products web site

On this web site you will find information about Ultrascale products. Ultrascale is the name under which a range of 4mm scale items for modelling British outline steam and diesel locomotives is produced. This range includes the most common locomotive and rolling stock wheels and conversion packs for proprietary, ready to run locomotives. Most of these items can be supplied for either 'OO' Fine scale, E.M. or 18.83 gauges. Also available is a range of worm and wheel gear sets and spur gears suitable for 2mm, 4mm and 7mm scales.

For a comprehensive and up to date list of products and prices, please visit our 'Products' section.


Product Update and Information

Commissioned Conversions

Hornby Class 'T9'.

We have just finished our latest new conversion commission, which was for a Hornby BR 4-4-0 Class T9. Due to the limited space between the inside of the splashers and the front tyre face of the wheel, we converted this model to EM use our EMF wheel profile (the same setup we use for Pendon) as a result there has been no need to make any changes to the body of the model to clear either the wheels or the crank pins. The only problem if you call it that, is the pick-ups on the tender. These are only long enough for 'OO' and for any other gauge will need to be modified as required.


Alignment Fixture.

We have just completed our latest commission conversion. This time it was another Hornby T9, but with a 6 wheel tender. As we don't have the correct tender wheel for this model, we used our GWR 4' 11/2" tender wheels. The main problem was that 18.83 gauge wheels would not fit between the frames of the tender. So we removed the side frames and spaced them out enough to get the 18.83 wheels in. To help with this we made up an alignment fixture so they could easily be glue back in place. This fixture can be seen in the above photo.


To see the current list of Non-Production/Custromer Commission Conversions, click here.

Gear Lab


Gear Lab is a collection of gear data calculators in the form of an iPhone app that can be used with Worm gears, Helical gears and Spur gears.

Gear Lab has been developed by SpiralArm Consulting Limited and Gear Services (Letchworth) Limited to help in the manufacture of the Worm and Wheel gear sets, Spur gears, Pinions and Helical gears available via the Ultrascale web site. However, it can be used for the same type of gears from other sources.

Version: 1.0.0
Released: 6th July 2015


Spur Gear Calculator


This calculator is an iPhone app that can be used to calculate the Outside Diameter, Centre Distance and Ratio of spur gears and pinions.

Please note that this calculator should ONLY be used for spur gears and pinions, NOT for helical gears.

This calculator was initially developed for use with the spur gears and pinions available via the Ultrascale web site. However, it can be used for spur gears and pinions from other sources.

Version: 2.0.1
Released: 17th June 2015


Latest Production Releases

3'61/2" LMS 10 Spoke tender STANIER.

This is our latest new tender wheel for use on the Ivatt Class 4 also know as 'Mucky Ducks or Pigs' it is available in 'OO', EM and 18.83 gauges.


Cosmetic Chassis Side Frames for Hornby Class 2800/3800.

These cosmetic chassis side frames have been designed and developed by Philip Hall for use with EM and 18.83 gauge wheels. An article dealing with the use of the side frames can be found in the MRJ 216.


Conversion for Hornby Class 2800.

This converstion pack is for the Hornby Class 2800 locomotive and is available in 'OO', EM and 18.83 gauges.


Cosmetic Chassis Side Frames for Bachmann ROD 2-8-0.

These cosmetic chassis side frames have been designed and developed by Philip Hall for use with EM and 18.83 gauge wheels.


For more information on the above 'Latest Production Releases', see the 'New' section of our web site.

Cheque Based Mail Order Payments

Having now looked at our new bank changes for the processing of cheques/postal orders. We have taken the decision that we will now have to introduce a £5.00 surcharge charge for all orders that are paid for either by cheque or postal order. We are sorry to have to take this action but it has been force on us by the increase in bank charges for these items.

This new charge will only apply to cheque/postal order payments and will be introduced from Monday 14th October 2013. Any orders that are received from this date on, that do not meet this rquirement will be returned.

Gearbox development using 3D printing

Last updated: 14/09/2013

If you are interested in 3D printing, then why not follow our progress on Facebook as we build and test the 3D printer from Ultimaker.

We have now produced a simple 3D printed gear box case for our new 2:1 crossed helical set set shown below. The basic dimesions of the case are Height 19mm, Width 14mm, Depth 9.5mm. The gear box has ball races on both the input and output sides of the box.


Spam Filters and Email Blockers

Could any customer that places an order and uses any form of spam filter or email blocker on their in coming email, please make sure that they allow the domain names '' and '' to pass through. Otherwise any email updates from us which relate to any order that they have placed may not get to them, which could cause either a delay or a cancellation in their order.

We Welcome...

While every endeavour has been made to ensure the information in these web pages is correct, Gear Services (Letchworth) Ltd. cannot be held liable for any omissions and/or inaccuracies.