Products
Polponte develops, engineers, manufactures and distributes high quality solutions and components for power transmission for industrial applications of excellence worldwide, with the aim of increasing the productivity of its customers’ machines and systems.
Our production uses the most advanced and modern technologies. Through constant investment in machinery, equipment and tools, Polponte achieves high productivity and efficient flexibility which, along with strict controls on product quality guaranteed by ISO9001 certification, allow the company to meet the most stringent requirements. The great attention to human resources and their constant development and training, drive the continuous improvement process as our main goal.
Standard Pulleys & V-Belts
On the market you find many V-belts, among which the most used are the “narrow” SPZ – SPA – SPB – SPC (DIN 7753/1), the “classical” Z – A – B – C (DIN 2215 – ISO and UNI 5265) and the American narrow 3V – 5V (RMA-MPTA).
On the “narrow V-belt pulleys” (DIN 2211 – ISO 4183) it is possible to use correctly all these V belts.
“Polponte presents in this catalogue its own range of standard pulleys, which are, in regard to the grooves, all produced according to DIN 2211 (ISO 4183) except for C-section.”
Pulleys with V Section grooves pre-machined for Taper bushing. The following V Belts are suitable for use with these pulleys:
- SPZ-Z-3V
- SPB-B-5V
- SPA-A
- SPC-C
Our PT-PBT and PCT pulleys are made of cast iron, quality DIN 1691 GG20 – GG25.
The dimensions are very precise as the pulleys are turned exclusively by means of CNC or automatic lathes. These pulleys can be used for speed up to 35 m/s.
Our PT-PBT and PCT pulleys are black Phosphated.
Our PBT pulleys are statically balanced UNI 4218 – VDI 2060, G16 degree. The PT and PCT pulleys are not balanced as they do not have a finished bore.
Manufacturing tolerances are strictly maintained to ensure perfect fit and operation.
_ Tolerance of pitch diameter DW
◊ Tolerance of eccentricity concerning the outside diameter
◊ Tolerance of lateral oscillation concerning the pitch diameter
▫ Max. difference among the pitch diameters of grooves of the same pulley:
- 0,4 mm for SPZ – SPA – SPB
- 0,6 mm for SPC
