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SERVOPLUS 45 GSPM (GSP45M) - Hub (Pilot-Bored, d = 13.5 mm, Al Alloy)

Shaft Coupling

Price for you :

Price without VAT: 48.61

Price including VAT: 58.82 with VAT

Catalogue price excluding VAT:
49.59

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.

Specifications

Diameter M (mm): 83.00 Diameter M
Outer diameter of the coupling. In SERVOPLUS couplings, it is commonly denoted as M.
Length LM (mm): 31.00 Length LM
Length of the coupling hub. In SERVOPLUS couplings, it is commonly denoted as LM.
Bore Fg (mm): 13.50 Pilot Bore Fg
Designed for further machining to the final dimension. The pre-drilled hole is therefore not machined to final tolerance for direct use.
Brand: SIT
Material: Aluminium alloy Material
In the TYMA Product Catalogues you can find this material also described with the abbreviation AL.
Weight (kg): 0.422

Shaft Coupling Description

SERVOPLUS 45 GSPM (GSP45M) - Hub (Pilot-Bored, d = 13.5 mm, Al Alloy) is a part designed for SIT SERVOPLUS bellows couplings. It is made of aluminium alloy.

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.

Construction

SIT SERVOPLUS Coupling Construction with GSPM Hubs

  1. GSPM hubs with a pilot bore and a hole for a radial clamping screw
  2. Bellows element

Typical Applications

Example Application – Precision CNC Machine Tool Servo Drive

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

Documents for Download

SERVOPLUS Bellows Couplings

SIT Catalog

English (PDF 214.65 kB)


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Shaft Coupling Manufacturer Profile

SIT

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.

more information about manufacturer

SERVOPLUS Couplings – Made for Servo Drives

2026-09-01

Patented modular design simplifies machine servicing and allows for more efficient component use and storage.

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