Can PU timing belts be supplied with cleats, profiles or coatings?

Question

Accepted Answer

Direct answer: Yes. PU timing belts can be supplied with welded or moulded cleats, ground or perforated back surfaces, tracking guides and side walls, and bonded covers such as natural rubber, silicone or PVC, all made to your drawing.

PU timing belt with moulded cleats fixed to the back surface — PU timing belt with cleats fixed to the back surface to a customer drawing (13.7AT10-4200).

What can be added to a PU timing belt

Cleats and flights

Cross cleats in PU or rubber, welded, screwed or moulded in place at your spacing. Welded cleats suit medium loads; moulded cleats hold position and angle more accurately on high-cycle drives.

Covers and coatings

Natural rubber for grip, silicone for release and heat, PVC for low friction. Coating thickness is typically 1 mm to 6 mm, depending on the compound and the load.

Machining

Back-side grinding, perforation, tracking guides and edge trimming. Machining is done from the back, so the tooth flanks that carry the load stay untouched.

What to send with your enquiry

Belt code, or pitch plus length, plus width, for example 13.7AT10-4200 or 8M-2320-35.
Cleat drawing: profile, height, width, spacing, position from the belt end, and whether cleats run on one edge or both.
Cover type and thickness, or the material being conveyed and its temperature.
Pulley diameters and whether the belt runs over a back-side idler, because cleats must clear the idler.
Quantity per order and the annual volume you expect.

PU timing belt with a silicone coating bonded to the back — Silicone-coated PU belt for release and heat resistance (120XL-12).

Practical limits worth knowing

Feature	Typical limit	Why it matters
Cleat height	Roughly up to one third of belt width, less on small pulleys	Tall cleats cannot pass over a small pulley without reverse bending
Cleat spacing	About 25 mm to 30 mm minimum for welded PU cleats	Closer spacing weakens the weld zone and raises cost quickly
Position tolerance	Normally within about plus or minus 1 mm	Confirm the value on your drawing before production starts
Coating thickness	1 mm to 6 mm, thinner on small pulleys	Thick soft covers can delaminate at speed or stiffen the belt

Cleats and covers add function, not tensile strength. A cleated belt is still limited by the same cord and tooth capacity as the base belt, so size the drive on the base belt rating and treat the cleat load as additional duty.

PU timing belt with a natural rubber cover bonded to the back — Natural rubber cover bonded to a PU belt for higher friction (160XL-20+3NR).

Need cleats or a coating on a PU belt?

Send the belt code, the cleat drawing and the quantity to sales@goodlybelts.com, or use the enquiry form on this site. We will reply with feasibility, any tooling requirement and a lead time.

Send your drawing