Internal Box Section Sliding Gate Wheel 140mm, 20mm Round Track

A large 140mm wheel that sits inside a box section rail, for sliding gates on 20mm round track. This is the largest internal wheel in the range, listed at 140mm and given as 138mm on the data sheet. It needs a deep rail, because about 105mm of the wheel rises above the mounting face, but it gives you a hidden wheel and a large diameter on the same gate. The foot is 200mm long, with 9mm holes at 170mm centres, and 33mm of the wheel shows below the rail. The groove is half round, 20mm across, for 20mm round bar. The price shown is for one wheel with its bracket, with a minimum order of 5.

Important: This wheel runs on 20mm diameter round bar track only. It will not run on V section track or in a cantilever track. Data sheet sizes are a guide; components can vary slightly.

Why this wheel works

A half round groove on a round bar. The groove cups the top of a 20mm round bar and spreads the load along the contact, which keeps the gate centred as it travels and gives a quieter roll than a flat wheel.

A simple running gear. This line is not listed as double bearing, which keeps the price down for a gate opened by hand a few times a day. Choose a double bearing wheel if the gate is motor driven or in constant use.

Hidden, but still a big wheel. Larger wheels roll more easily over grit, and most hidden wheels are small. With this size you get both, provided the rail is deep enough. The bracket is 38mm wide across the foot, so a rail narrower than that will not take it.

Where it is used

Heavier box section sliding gates on 20mm round bar where the wheel is to be hidden, such as commercial frontages, depots and estates. Fit it into a new gate with a rail deep and wide enough to take the wheel. It is not for rails below that height, for V section track or for cantilever gates.

Specifications

Choosing the right wheel

If your rail is not deep enough, the 80mm internal wheel takes a rail far shallower, needing only about 51mm above the mounting face. If you are working with an existing rail that cannot be slotted, use an external bracket wheel: the 140mm double bearing or standard bracket wheels run on the same 20mm bar. We also list 100mm and 120mm box section housing wheels in other housings, if you want a size in between.

See all gate wheels and sliding gate track.

Fitting and care

Cut a slot in the underside of the rail, long enough to clear the 200mm foot and wide enough for the 38mm bracket. Check that the section is deep enough to clear about 105mm of wheel above the mounting face. Offer the wheel up from underneath and bolt the two foot flanges to the rail through the holes at 170mm centres. Fixings are not listed as included, so allow your own. Leave no sharp edges on the slot, and paint any bare steel.

Keep the track clear of stones and packed dirt, and check the wheels and fixings at each service. Plating gives light protection only, so touch up scratches and welds with zinc-rich paint. Replace a wheel that has worn or stiffened, and check its partner at the same time.

Frequently asked questions

Ordering and delivery

Order 5 or more online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.