Basket Summary
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Delivery Time

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

Orders in Progress

The following orders are currently being processed.

02/05/2016 to 13/05/2016
UO2219 to UO2237

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.

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.


Gearbox development using 3D printing

Last updated: 18/10/2016

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.

Just a quick update to show the lastest of our prototype gearboxes with 3D printed case. This is a 38:1 worm and wheel box, the one with the fly wheel can have both input and output shafts remove with out having to dis-assemble the gear box.


Conversion for Rapido APT-E

Converted Power Car with 18.83 gauge wheels.

Commission Conversions

Heljan Class 23 'Baby Deltic'.

One of our latest commissioned conversions is a Heljan Class 23 'Baby Deltic' in EM.


Hornby Class 59.

This is the other one of our latest commissioned conversions a Hornby Class 59 also in EM. One thing to note with this model is that the magnet in the motor lifts the centre axle and wheels of the power bogie off the track. This was fixed by replaceing the 2.5mm steel axle with a brass one of the same diameter.


Spur Gear Calculator


Spur Gear Calculator has been developed by SpiralArm Consulting Limited and Gear Services (Letchworth) Limited as a collection of gear data calculators in the form of either an iPad or iPhone app that can be used 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 app 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: 3.0.0
Released: 18th June 2016


Gear Lab


Gear Lab is a collection of gear data calculators in the form of either an iPad or 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: 2.0.1
Released: 23rd February 2016


'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.

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.


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.

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.