Basket Summary
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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.

20/07/2015 to 31/07/2015
UO1846 to UO1860

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.


'O' Gauge Bassett-Lowke Chassis

Having seen the work carried out to the Bassett-Lowke motor bogie in the 'Workshop' section of our web site. We were asked if we could do the same repair work to a Bassett-Lowke chassis to replace the badly worn gears on this 80+ year old chassis.

Commission Conversions

Heljan Class 128.

Our latest commissioned conversion was a Heljan Class 128 in 18.83. Not much to say about this conversion except that the cross bar between the bogie sideframes was cut in half and new brass frame spacers made to allow the side frames to be push out for the new 18.83 gauge wheels.


Product Update and Information

Commissioned Conversions

Greek Adtranz.

We have just finished our latest conversion which is for the Greek Adtranz model by Alpha Trains, AT13001, AT13002, AT13003, AT18010, AT18011 as Greek OSE A471, A475, A478, 220022 & 220036.

All the above types of models were for two rail DC or DCC operations.


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


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.