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VTP - High Speed V-Belt Pulleys

VTP high-speed V-belt pulleys in SPZ, SPA, SPB and SPC profiles are a special type of V-belt pulleys. They are made of cast steel GGG 50 and compared to conventional pulleys made of gray cast iron, they have significantly better properties: higher strength and resistance, lower weight and higher peripheral speed.

The pulleys are mounted to the shafts using Taper Lock cone bushings.

SPZ VTP - High Speed V-Belt Pulleys - Preview

SPZ High Speed VTP

For belts SPZ, XPZ, 3V, 3VX, Z/10, ZX/10
Groove width b (mm): 10.0
Diameter Dm (mm): 50 - 630
SPA VTP - High Speed V-Belt Pulleys - Preview

SPA High Speed VTP

For belts SPA, XPA, A, AX, 13
Groove width b (mm): 13.0

Diameter Dm (mm): 63 - 900

SPB VTP - High Speed V-Belt Pulleys - Preview

SPB High Speed VTP

For belts SPB, XPB, 5V, 5VX, B, BX, 17
Groove width (mm): 17.0
Diameter D(mm): 900 - 1250
SPC VTP - High Speed V-Belt Pulleys - Preview

SPC High Speed VTP

For belts SPC, XPC, C, CX, 22
Groove width b (mm): 22.0

Diameter Dm (mm): 160 - 1250


Pulleys Fields of Use

The VTP® V-belt pulleys are designed for the highest peripheral speeds in all areas of engineering, especially for applications with high temperature, alternating and impact load, and wherever the conventional cast iron V-belt pulleys cannot be used.

They are typically used in compressors, blowers, machine tools, in the paper and chemical industry and in many other machines.

Pulleys Characteristics

  • Up to 50% lower weight
  • Increased peripheral speed up to 60 m/s (theoretically up to 100 m/s)
  • Lower moments of innertia
  • Longer V-belt life-span
  • Made of cast iron quality GGG 50 of higher strenght
  • New CDP (KTL) coating improves rust protection
  • Decreased temperature of the belts - up to 17 °C

Pulleys Material

Cast iron GGG60.

Pulleys Advantages

Decreased temperature of the belts up to 17 °C

A study demonstrates reduction of temperature of belts in VTP® pulleys up to 10 to 17 °C against standard pulleys. The pulleys have a perforated bottom groove and the heat is drained off the belt better during operation. Punching does not affect the pulley strength.

The tests show that the belts after 2 hours of operation of the VTP® SPB250-4 pulley have a temperature more than 10 °C lower that the standard SPB250-4 pulley.

Belt Temperature - Standard Pulley after approx. 2 hours of operation Belt Temperature - VTP Pulley after approx. 2 hours of operation

Pulleys Code Description

Example:
SPB 630/4 VTP TB 3525

Code Part Description
SPB

Profile

630

Nominal diameter of pulley in mm

4

Number of grooves

VTP

Ventilated Turbo Pulley high speed

TB

Taper bush

3525

Type of Taper busch

Pulleys Profile and Dimensions

Single and Multiple Wedge Groove Dimensions

Profile Dm
[mm]
α
[°]
B1
[mm]
Bm
[mm]
E
[mm]
F
[mm]
C
[mm]
T
[mm]
SPZ (≤80) >80 (38) 34 9.7 8.5 12.0 8 2.0 11.0
SPA (≤118) >118 (38) 34 12.7 11.0 15.0 10 2.8 13.8
SPB (≤190) >190 (38) 34 16.3 14.0 19.0 12 3.5 17.5
SPC (≤315) >315 (38) 34 22.0 19.0 25.5 17 4.8 23.8

Crown width \(B\): \[B = {E^{(n-1)} + 2 \cdot F}\ {[mm]}\] where \(n\) is the number of grooves.

Other technical data for particular groove dimensions are to be found in the technical documentation.

Documents for Download

Dimensions and Parameters of VTP V-Belt Pulleys - Preview

Dimensions and Parameters of VTP V-Belt Pulleys

TYMA CZ Data Sheets

Czech and English (PDF 2.05 MB)

Pulleys and Clamping Bushes - Preview

Pulleys and Clamping Bushes

TYMA CZ Catalogue

Czech and English (PDF 3.64 MB)


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