Power Transmission Belts
Friction and toothed belts that carry motor power to driven machinery. The family spans classical and wedge V-belts, raw-edge cogged sections, banded assemblies, ribbed belts and synchronous toothed belts. SES holds the range as an authorised JK Fenner distributor, covering classical sections Z, A, B, C, D, E; wedge sections SPZ, SPA, SPB, SPC and equivalent narrow types; ribbed sections PJ, PK, PL, PM; synchronous pitches Trapezoidal and curvilinear metric and imperial pitches. Executions include classical wrapped v-belts, narrow wedge v-belts, raw-edge cogged v-belts, banded v-belts, among others. It is specified most often into ID and FD fan drives on boilers and jaw and cone crusher flywheel drives. Every part is genuine JK Fenner through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
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From integrated steel plants to power utilities and EPC majors — the works that cannot afford a counterfeit part specify through SES.
Drive type
Friction and positive engagement
Power span
Fractional horsepower to several hundred kW
Marking
Section letter plus datum or pitch length
Wear signs
Glazing, sidewall cracking, tooth shear
Where it runs.
You will find Power Transmission Belts in the parts of a plant where this particular duty actually occurs. In practice that means ID and FD fan drives on boilers, jaw and cone crusher flywheel drives, machine tool headstock and spindle drives, and equally air compressor and reciprocating pump drives, agro processing mills, hullers and decorticators, cooling tower fan gearbox input drives. What links them is the duty rather than the machine name — drive type: Friction and positive engagement. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the JK Fenner range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. Existing classical V-belt drive is short on capacity in the same centre distance — Move to a narrow wedge section. It carries more power per unit width, but the pulley grooves must be changed to suit; running wedge belts in classical grooves wedges them to the groove floor and burns the flanks. Small pulley diameter below the recommended minimum for the section — Raw-edge cogged construction. The notched undercord lets the belt bend tighter without heat build-up in the compression section. Timing or indexing must be maintained between shafts — A synchronous toothed belt with matched pulleys. Any friction belt will creep, and on a pump or feeder that shows up as drifting output, not as an obvious fault. Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Never mix old and new belts in one multi-groove drive. The used belts have taken a permanent set and the new ones will carry almost the whole load until they stretch, which is usually inside a fortnight.