SIT TRASCO ES GESP Hubs (Unbored)
GESP unbored hubs are parts designed for SIT TRASCO ES zero-backlash shaft couplings. They are sometimes simply called as basic GES series hubs, or labeled as GES P.
SIT TRASCO ES are torsionally flexible, puncture-proof shaft couplings with two metal hubs with front claws and a polyurethane element. They transmit torque through a high-precision pressure-stressed elastic star-shaped buffer which absorbs shock and torsional vibration. The hubs are manufactured with minimal backlash so that the flexible elements are very tightly inserted into the front teeth to make a so-called zero-backlash coupling. These GESP hubs are made of steel or aluminium alloy as unbored. They are therefore supplied as semi-finished products and the bore must be adjusted before mounting the coupling on the shafts.
Products are sorted by name in ascending order.
TRASCO ES 7 GESP (GESP7) - Hub (Unbored, Al Alloy)
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.
4.94€ excl. VAT
5.98€ incl. VAT
TRASCO ES 9 GESP (GESP9) - Hub (Unbored, Al Alloy)
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.
4.98€ excl. VAT
6.02€ incl. VAT
TRASCO ES 12 GESP (GESP12) - Hub (Unbored, Al Alloy)
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.
5.47€ excl. VAT
6.62€ incl. VAT
TRASCO ES 14 GESP (GESP14) - Hub (Unbored, Al Alloy)
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.
5.69€ excl. VAT
6.89€ incl. VAT
TRASCO ES 19/24 GESP (GESP19/24) - Hub (Unbored, Al Alloy)
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.
11.09€ excl. VAT
13.41€ incl. VAT
TRASCO ES 24/28 GESP (GESP24/28) - Hub (Unbored, Al Alloy)
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.
14.70€ excl. VAT
17.79€ incl. VAT
TRASCO ES 28/38 GESP (GESP28/38) - Hub (Unbored, Al Alloy)
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.
21.22€ excl. VAT
25.68€ incl. VAT
TRASCO ES 38/45 GESP (GESP38/45) - Hub (Unbored, Al Alloy)
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.
41.45€ excl. VAT
50.15€ incl. VAT
TRASCO ES 42 GESP (GESP42) - Hub (Unbored, Steel)
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.
68.96€ excl. VAT
83.44€ incl. VAT
TRASCO ES 48 GESP (GESP48) - Hub (Unbored, Steel)
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.
78.34€ excl. VAT
94.79€ incl. VAT
TRASCO ES 55 GESP (GESP55) - Hub (Unbored, Steel)
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.
89.37€ excl. VAT
108.13€ incl. VAT
TRASCO ES 65 GESP (GESP65) - Hub (Unbored, Steel)
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.
117.45€ excl. VAT
142.11€ incl. VAT
TRASCO ES 75 GESP (GESP75) - Hub (Unbored, Steel)
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.
241.30€ excl. VAT
291.97€ incl. VAT
Products are sorted by name in ascending order.
Shaft Coupling Construction
- GESP unbored hubs
- Elastic star-shaped element
Typical Applications
SIT TRASCO ES zero-backlash elastic couplings with GESP hubs are intended for the highest demands in a wide range of industries where the highest precision and minimum backlash are required.
They are used, for example, in machine tools, testing machines, fine mechanics, dynamometers and many other applications, particularly in the food, chemical, paper, metalworking and automotive industries.
Properties
- Torque transmission without backlash
- Vibration damping from the motor shaft (up to 80%)
- Easy and quick installation
- Couplings are resistant to oil, chemicals and high temperature
- Small size, low moment of inertia
Coupling Code Description
Example:
TRASCO ES 9 GESP - Hub (Unbored, Al Alloy)
| Code Part | Description |
|---|---|
| TRASCO ES |
SIT couplings type |
| 9 |
Coupling size designation |
| GESP |
Hub type |
| Hub |
Part name |
| Unbored |
Hub design |
| Al Alloy |
Hub material |
Documents for Download
Related Products
SIT TRASCO ES GESF Hubs (Finished Bore)
SIT TRASCO ES GESM Hubs (Clamping)
SIT TRASCO ES GESA Hubs (Shrink)
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.