SIT TRASCO GRMB Hubs (Taper Bored)
GRMB taper bored hubs are parts designed for SIT TRASCO shaft couplings. They are sometimes simply called as the TRASCO GRB series hubs, or labeled as GR B or GR MB.
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 GRMB hubs are made of cast iron with Taper Lock bore in B1 version with external mounting or B2 version with internal mounting.
Products are sorted by name in ascending order.
TRASCO 28/38 GRMB B1 (GRMB28/38B1) - Hub (Type E, TB 1108, Cast Iron)
Shaft Coupling
In Stock We update the stock availability information every 2 hours.
The goods we have in stock are usually ready for shipping or personal collection no later than the next working day. In case of personal collection, please do not come to pick the goods up before we contact you that the goods are ready.
28.37€ excl. VAT
34.33€ incl. VAT
TRASCO 28/38 GRMB B2 (GRMB28/38B2) - Hub (Type I, TB 1108, Cast Iron)
Shaft Coupling
In Stock We update the stock availability information every 2 hours.
The goods we have in stock are usually ready for shipping or personal collection no later than the next working day. In case of personal collection, please do not come to pick the goods up before we contact you that the goods are ready.
28.37€ excl. VAT
34.33€ incl. VAT
TRASCO 38/45 GRMB B1 (GRMB38/45B1) - Hub (Type E, TB 1108, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
44.20€ excl. VAT
53.48€ incl. VAT
TRASCO 38/45 GRMB B2 (GRMB38/45B2) - Hub (Type I, TB 1108, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
44.20€ excl. VAT
53.48€ incl. VAT
TRASCO 42/55 GRMB B1 (GRMB42/55B1) - Hub (Type E, TB 1610, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
50.42€ excl. VAT
61.01€ incl. VAT
TRASCO 42/55 GRMB B2 (GRMB42/55B2) - Hub (Type I, TB 1610, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
50.42€ excl. VAT
61.01€ incl. VAT
TRASCO 48/60 GRMB B1 (GRMB48/60B1) - Hub (Type E, TB 1615, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
60.74€ excl. VAT
73.49€ incl. VAT
TRASCO 48/60 GRMB B2 (GRMB48/60B2) - Hub (Type I, TB 1615, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
60.74€ excl. VAT
73.49€ incl. VAT
TRASCO 55/70 GRMB B1 (GRMB55/70B1) - Hub (Type E, TB 2012, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
92.95€ excl. VAT
112.47€ incl. VAT
TRASCO 55/70 GRMB B2 (GRMB55/70B2) - Hub (Type I, TB 2012, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
92.95€ excl. VAT
112.47€ incl. VAT
TRASCO 65/75 GRMB B1 (GRMB65/75B1) - Hub (Type E, TB 2012, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
94.57€ excl. VAT
114.43€ incl. VAT
TRASCO 65/75 GRMB B2 (GRMB65/75B2) - Hub (Type I, TB 2012, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
94.57€ excl. VAT
114.43€ incl. VAT
TRASCO 75/90 GRMB B1 (GRMB75/90B1) - Hub (Type E, TB 2517, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
143.76€ excl. VAT
173.94€ incl. VAT
TRASCO 75/90 GRMB B2 (GRMB75/90B2) - Hub (Type I, TB 2517, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
143.76€ excl. VAT
173.94€ incl. VAT
TRASCO 90/100 GRMB B1 (GRMB90/100B1) - Hub (Type E, TB 3535, Cast Iron)
Shaft Coupling
At Supplier
Within 3 Weeks Usual time this product is ready for shipping. Actual availability may vary due to unforeseen circumstances in exceptional cases.
311.51€ excl. VAT
376.92€ incl. VAT
Products are sorted by name in ascending order.
Shaft Coupling Construction
- GRMB type B2 for Taper Lock bush with internal mounting
- Elastic star-shaped element
Typical Applications
SIT TRASCO elastic couplings with GRMB hubs are intended for the highest performance in a wide range of industries.
They are applied in compressors, pumps and construction machinery. Especially for conveyor systems and packaging machines in the food, chemical, glass, paper, wood and rubber industries.
Properties
- 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
- Simple assembly without the need to modify the bore
- Couplings areresistant to oil, chemicals and high temperature
Coupling Code Description
Example:
TRASCO 90/100 GRMB B1 - Hub (Type E, TB 3535, Cast Iron)
| Code Part | Description |
|---|---|
| TRASCO |
SIT couplings type |
| 90/100 |
Coupling size designation |
| GRMB |
Hub type |
| B1 |
Taper Lock design with external mounting |
| Hub |
Part name |
| Type E |
External mounting design |
| TB 3535 |
Type of Taper Lock bush |
| Cast Iron |
Hub material |
Documents for Download
Related Products
SIT TRASCO GRMALU Hubs (Unbored)
SIT TRASCO GRMP Hubs (Unbored)
SIT TRASCO GRS Spacers (Double Shaft)
We also provide design and calculation of transmission components, including shaft couplings. In the case of your interest in this service, use the detailed Drive or Coupling Calculation Form.
Shaft Coupling Manufacturer Profile
SIT S.p.A. is a company focused on mechanical power transmission (SIT stands for Società Italiana Trasmissioni, meaning Italian Power Transmission Company). Under the SIT brand, it develops, engineers, manufactures, and distributes high-quality solutions and components for industrial applications across a wide range of sectors – from automotive and precision engineering to the food and textile industries, as well as chemical plants and logistics centers.
Together with Elatech S.r.l. and other companies, SIT S.p.A. is part of the Scaglia Group. The Group operates in Europe, North America, and Asia, and comprises 7 manufacturing facilities and 6 subsidiaries with more than 1,000 employees. As part of the Group, the individual companies benefit from shared technologies and innovations, providing financial stability and sustainable growth.
We are an authorized distributor of shaft couplings, bushes, sprockets, and pulleys from SIT S.p.A., as well as polyurethane timing belts and conveyor belts from Elatech S.r.l.