Nylon Sliding Gate Wheel 80mm (78mm Actual), 20mm Round Groove, Internal Box Section Housing

A white nylon sliding gate wheel, sold as 80mm and measuring 78mm, in a bright metal housing made to sit inside a box section bottom rail. You cut a slot in the underside of the rail, the housing goes up into it, and the two flat end tabs fix to the rail with the wheel protruding below. It runs on a 20mm diameter ground track, such as our 20mm galvanised sliding gate track. The housing is 135mm overall and 33mm wide, with 8mm holes on 110mm centres, and only 27mm of wheel shows below the top of the tabs. No load rating is published for this wheel, so treat it as having no stated rating. The price is for one wheel, with a minimum order of 6, and most sliding gates run on two.

Why this wheel works

The gate stays low. With the housing inside the rail, the gate sits closer to the track than it would on a hung bracket.

A cleaner rail. The housing is out of sight, which keeps the rail line straight and protects the wheel from knocks.

The round groove follows a 20mm section. The curved groove matches a 20mm diameter ground track, so the wheel stays centred. Measure your track before ordering, because the wheel will not seat on a smaller or larger section.

Quiet, and it will not rust. Nylon runs quietly on a steel track where a steel wheel can rattle, and it needs no painting. It is softer than steel, so grit and shock loads wear it faster, and it is not the choice for a heavy gate.

Where it is used

Box section sliding gates where a tidy bottom line matters, at site entrances, office and retail car parks. Your box section must be wider inside than the 33mm housing and have more than about 51mm of clear height, because that is how far the wheel rises above the tabs. Check both before you cut the rail.

Specifications

Choosing the right wheel

Start with the track, because the groove decides everything else. This wheel has a 20mm round groove with a 22mm opening at the rim, so it needs a 20mm diameter ground track and will not run on an inverted-V ground track or flat bar. For an inverted-V ground track, choose the V groove version, which has a 16mm opening.

Against the larger size. The 100mm wheel measures 98mm rather than 78mm. Its housing is 151mm overall and 32mm wide against 135mm and 33mm here, with its holes on 126mm centres rather than 110mm. Both show 27mm of wheel below the tabs, so the difference is inside the rail: this wheel rises about 51mm above them and the 100mm wheel about 71mm. Your box section needs that extra height.

Against the other fixings. In this size and groove, the stainless bracket bolts up under the rail and stands 85mm from plate to wheel base, while the bare wheel on an M10 bolt goes in a fork you make yourself.

See the full range of gate wheels.

Fitting and care

Cut the slot in the underside of the rail after measuring the housing you receive, because the body length between the tabs is not published. Drill and fix the tabs to the rail through the 8mm holes on 110mm centres. Do not weld with the wheel in place, because heat distorts nylon. Roll the gate through its full travel before you finish.

Keep the track swept, because grit is what wears a nylon wheel. Check for flats and groove wear at each service and renew the wheels in pairs.

Frequently asked questions

Ordering and delivery

Order 6 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.