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TRASCO 55/70 GRMP (GRMP55/70A) - Hub (Type A, Unbored, Cast Iron)

Shaft Coupling

Price for you :

Price without VAT: 52.16

Price including VAT: 63.11 with VAT

Catalogue price excluding VAT:
53.23

At supplier, we usually ship within 3 weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.

Shaft Coupling Parameters

Bore: Unbored
Brand: SIT
Material: Gray Cast Iron Material
In the TYMA Product Catalogues you can find this material also described with the abbreviation GG.

Shaft Coupling Description

TRASCO 55/70 GRMP (GRMP55/70A) - Hub (Type A, Unbored, Cast Iron) is a part designed for SIT TRASCO shaft couplings. It is made of gray cast iron.

SIT TRASCO are torsionally flexible, puncture-proof shaft couplings with two metal hubs with front claws and a polyurethane element. They transmit torque through pressure-stressed elastic star-shaped buffer which absorbs shock and torsional vibration. These GRMP hubs are made of steel or cast iron in short or long version with a seating or in straight design as unbored. They are therefore supplied as semi-finished products and the bore must be adjusted before mounting the coupling on the shafts.

GRMP hubs are sometimes simply called as the TRASCO GR series basic hubs, or labeled as GR P or GR MP.

Shaft Coupling Construction

SIT TRASCO Coupling Construction with GRMP Hubs

  1. GRMP type A (with a seating) unbored hub
  2. GRMP type B (straight) unbored hub
  3. Elastic star-shaped element

Shaft Coupling Fields of Use

SIT TRASCO elastic couplings with GRMP hubs are intended for the highest performance in a wide range of industries.

They are particularly applied in compressors, pumps, conveyors and construction machinery. From small precision instruments to heavy duty conveyor drives and packaging machines in the food, chemical, glass, paper, wood and rubber industries.

Shaft Coupling Characteristics

  • High transmitted power
  • Small size, compact version
  • Polyurethane elastic element allows the compensation of angular, axial and radial transplanting
  • Possibility of settlement of length shafts deviations
  • Couplings areresistant to oil, chemicals and high temperature

Documents for Download

TRASCO Couplings - Preview

TRASCO Couplings

SIT Catalogue

English (PDF 1.35 MB)


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Manufacturer Profile

logo SIT

The group SIT S.p.A 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. With operations on 3 continents, SIT manufactures pulleys, rubber and polyurethane belts, drive couplings, locking assemblies and a wide range of accessories.

SIT belongs to a large industrial group that dates as far back as 1838. Today, thanks to over 50 years of specific experience in power transmission and a close-knit team of highly qualified professionals, the Group engages in constant technological innovation in order to offer the best application solutions in mechanical power drives.

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