Ultrascale Products | Your Sign of Quality for 4mm Scale Wheels and Gears

Ultrascale Model Railway 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 items for 'OO' Fine scale, E.M. or 18.83 gauges. Also available is a range of gears suitable for various scales and applications.
Gear Cutting

As well as the standard gears listed, we are able to produce gears with other tooth sizes and numbers of teeth as a bespoke service for the modeller.
Mobile Apps

We have designed and developed a number of gear based mobile apps to help in the Setting up, Production and Checking of the gears. These apps are available for both iPhone and Android devices.

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 all scales.

We can also offer a bespoke gear cutting service, to produce gears outside the current range offered on the web site. We have also developed a number of mobile apps to help in the setup, production and checking of gears.

All items are produced to order, using manual production processes, which means that lead times can be long. (see 'Current Production Status' below)

Current Production Status

Delivery Time

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

Product Update and Information

New RTR Replacement Gears

We have now added a number of new gears for RTR models to our current range. These gears are the ones used for some of the commission conversions that we have done as well as some of our production conversions. These gears can be used as direct replacements for any of the original plastic ones on the model that split or get damaged. Other RTR gears will be added as time allows.

Gear-Blocs

Prototype Gearbox Design & Construction System

Is a proposal for a modular gearbox design/construction system. The system uses 3D printed modules (blocs), which can be simply glued together to create a fully functional gearbox.

The current prototype has been developed for use with 'O' Gauge (7mm Scale) models. However, a 4mm scale version is currently being looked into.

The current system is divided in to three main sections, the Primary drive module, the Intermediate drive module and the Final drive module. (these are explained in greater detail below)

Commissioned Conversions

Dapol Streamlined Railcar

This was a customer commissioned job to convert the model to EM gauge. An 18.83 gauge set has also been done for this model.

Commission Gear Cutting

All brass gear train for 'O' Gauge Heljan Class 33

This was a customer commissioned job following some of the original nylon moulded gears splitting.

Gearbox development using 3D printing

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.