Timing belt Gates 1680-XH-400

GATES 1680-XH-400 belongs to timing belt, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 1680-XH-400 and any equivalents.

When a drive has to keep two shafts turning in step, a Gates XH timing belt is often the answer. Its molded teeth engage the grooves of a matching timing pulley, so the ratio stays fixed instead of drifting the way it can with a friction belt. Maintenance and purchasing teams specify these belts for machine tools, printing lines, positioning slides and other equipment where the motion has to repeat exactly. MR Industrial Accessories supplies them to customers in the United States and Latin America, quoting by part number through WhatsApp or email.

Reading the code tells you everything about the belt. Three pieces of information are packed into the designation: pitch length expressed in tenths of an inch, the XH profile, and width expressed in hundredths of an inch. Take 507-XH-200: 50.7 inches of pitch, XH tooth form, 2 inches wide. Take 630-XH-400: 63 inches of pitch, same profile, 4 inches wide. The profile fixes the pitch and the shape of the teeth, while the width sets how much power the belt can carry. Those three values are enough to pin down one belt and no other.

XH belts show up wherever the driven shaft cannot be allowed to slip out of phase. Typical spots are CNC lathes, packaging machinery, wide-format printers, industrial sewing heads, metering pumps and indexing conveyors. Food processing and water treatment plants also use them, since the drive stays clean and the timing repeats cycle after cycle.

Choosing a replacement starts with the pulleys: count the teeth, note the profile, measure the center distance and check the width that fits the pulley grooves. An XH belt only runs on XH pulleys; other profiles will not mesh. At installation, line up the two pulleys and apply just enough tension to keep the teeth from jumping, without putting extra load on the bearings. Wipe the belt clean and keep it away from oil and grease, which can attack the compound.

If the belt you are replacing comes from another maker, the length, profile and width code is what you need to cross it. Because timing belts are defined by those three measurements, that code is enough to locate the matching Gates reference. Send the full code to MR Industrial Accessories on WhatsApp or by email, and the team will come back with the right size. They can also suggest equivalents and help you pick the correct belt when the original markings are worn off.