SIT SERVOPLUS GSPM Hubs (Pilot Bore)
GSPM clamping hubs with a pilot bore are parts designed for SIT SERVOPLUS bellows couplings. They are sometimes simply called standard GSP series hubs, or labeled as GSP M.
SIT SERVOPLUS are all-metal, torsionally rigid bellows couplings with backlash-free torque transmission, designed specifically for servo motor drives where maximum positioning accuracy is required. They transmit torque through a durable stainless steel bellows element connected to metal hubs on both sides. GSPM hubs are made of aluminum alloy with a pilot bore and a hole for a radial clamping screw. They are therefore supplied as semi-finished parts, and the bore must be machined to size before mounting on the shaft.
Products are sorted by name in ascending order.
SERVOPLUS 16 GSPM (GSP16M) - Hub (Pilot-Bored, d = 4.5 mm, 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.
26.03€ excl. VAT
31.50€ incl. VAT
SERVOPLUS 20 GSPM (GSP20M) - Hub (Pilot-Bored, d = 7.5 mm, 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.
35.94€ excl. VAT
43.49€ incl. VAT
SERVOPLUS 30 GSPM (GSP30M) - Hub (Pilot-Bored, d = 9.5 mm, 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.
45.94€ excl. VAT
55.58€ incl. VAT
SERVOPLUS 38 GSPM (GSP38M) - Hub (Pilot-Bored, d = 13.5 mm, 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.
47.13€ excl. VAT
57.03€ incl. VAT
SERVOPLUS 45 GSPM (GSP45M) - Hub (Pilot-Bored, d = 13.5 mm, 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.
48.61€ excl. VAT
58.82€ incl. VAT
Products are sorted by name in ascending order.
Shaft Coupling Construction
- GSPM hubs with a pilot bore and a hole for a radial clamping screw
- Bellows element
Typical Applications
SIT SERVOPLUS bellows couplings with GSPM/GSPMF hubs and a GSPS bellows are designed specifically for drives controlled by servo motors, where in addition to torque transmission, maximum positioning accuracy and zero backlash are required.
They are used, for example, on the axes of CNC metalworking and woodworking machines, in robotics and manipulators, on packaging and printing machines, in instrumentation, measurement and automation technology, and on laser and cutting machines, as well as in other precision automated drives with closed-loop position control. They are also used in the food, chemical, paper, metalworking, and automotive industries.
Properties
- Torque transmission with maximum precision and zero backlash
- High torsional rigidity
- Low moment of inertia
- Excellent dynamic characteristics even at high speeds and during frequent load reversals
- Simple and quick installation
- Maintenance-free and wear-resistant
- Temperature resistance up to +300 °C
Coupling Code Description
Example:
SERVOPLUS 16 GSPM (GSP16M) - Hub (Pilot-Bored, d = 4.5 mm, Al Alloy)
| Code Part | Description |
|---|---|
| SERVOPLUS |
SIT coupling type |
| 16 |
Coupling size designation |
| GSPM |
Hub type |
| GSP16M |
Alternative part designation |
| Hub |
Part name |
| d = 4.5 mm |
Pilot bore diameter in mm |
| Pilot-Bored |
Hub design |
| Al Alloy |
Hub material |
Documents for Download
Related Products
SIT SERVOPLUS GSPS Bellows Elements
SIT SERVOPLUS GSPMF Hubs (Finished Bore)
SIT SERVOMATE Disc Couplings
All-metal, torsionally rigid, zero-backlash disc couplings with clamping hubs
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.
Related Articles
SERVOPLUS Couplings – Made for Servo Drives
Patented modular design simplifies machine servicing and allows for more efficient component use and storage.