TRASCO® couplings are manufactured dimensionally with hub types "A" and "B," the difference being the maximum shaft diameter they can accept (corresponding to the first and second code numbers, respectively). The long hub "L" design (allowing complete coverage of the motor shaft) is available in "A" and "B" designs.
TRASCO® couplings
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Description
SIT TORQUE-FLEX® narrow “XP” high-performance belts are manufactured in accordance with European standards ISO 4184 and DIN 2215. Designed for high-speed operation on small-diameter pulleys and short center distances, they are also suitable for use in multiple V-belt drives where high shock loads and heavy loads are encountered. No special selection is required for multiple drives, as they are manufactured according to the Matchmaker® System , which ensures tighter production tolerances compared to regulatory limits.
Features
- Profile: XPZ-XPA-XPB-XPC
- Static conductor (ISO 1813)
- Temperature: -20/+70 °C
- Traction members: Vytacord (high-strength polyester)
- Composite: Wingprene
- Guaranteed dimensional stability
- Greater flexibility (molded sprocket)
- The reinforced tension members
- Matchmaker® System
Available with standard V-pulleys made of DIN 1691 GG20/GG25 cast iron, with solid shaft, for mounting SER-SIT® tapered bushes, preconfigured with oversized hub for self-locking units or according to customer specifications.
Available TRASCO® configurations
GR Base program
GRB Execution for SER-SIT® tapered bushing
TRASCO® GRB couplingsfor SER-SIT® tapered bushings are manufactured from GG25 cast iron.
They combine the high performance typical of standard TRASCO® couplings with the advantages of easy assembly and disassembly using the SER-SIT® tapered bushing.
These cubes are manufactured in two different assembly versions:
B1: Installation of tapered hub from the outside
B2: Installation of tapered hub from the inside (not available for size 90/100)
The GRB design eliminates the problem of corrosion, making it suitable for all types of machinery.
B1 type cubes allow axial displacement for star replacement.
GR CAL Execution with SIT-LOCK® CAL 8 clamping bushings
This design has been introduced to incorporate the advantages offered bySIT-LOCK® CAL 8 clamping hubsin the shaft-hub connection. The system allows for quick, secure, play-free assembly without the use of a keyway, eliminating the need for lock washers, spacers, and retaining rings.
We can design multiple solutions to meet all types of application needs.
GRL double cardan drive with extended shaft
TheGRL CAL3series allows two shafts (even two spaced shafts) to be joined using two TRASCO® couplings and a custom-sized intermediate shaft (length "LR2") mounted to the hubs using clamping bushings. The presence of two polyurethane stars allows for high damping capacity and greater radial misalignments. By default, the hubs are made of cast iron, while the shafts are made of steel, but different materials can be used depending on the application.
GRLCAL3 double cardan shaft with extended shaft and SIT LOCK 3 clamping bushing
TheGRL CAL3series allows two shafts (even two spaced shafts) to be joined using two TRASCO® couplings and a custom-sized intermediate shaft (length "LR2") mounted to the hubs using clamping bushings. The presence of two polyurethane stars allows for high damping capacity and greater radial misalignments. By default, the hubs are made of cast iron, while the shafts are made of steel, but different materials can be used depending on the application.
GRF flange execution
The GRF series with flanges has been developed for heavy machinery applications and to combine different shaft and flange solutions.
GRFC compact flange design
The GRFC series has the same features as the GRF series but is more compact.
GRS double cardan shaft drive
The GRS series allows for greater compensation of axial, radial, and angular misalignment. In addition, the use of a double star allows the torsion angle to be doubled and provides a very high damping effect.
The GRS series allows for compensation of high axial, radial, and angular misalignment. In addition, the use of the double spider allows for twice the torsional angle and provides a high level of damping.
GRFRT execution for brake drums
The GR FRT series has been developed to fit drum brake transmission (FRT).
An elastic coupling is considered to consist of:
Standard hub (any of the TRASCO family)
Elastic star
Special hub connected to the brake drum
In addition, it is possible to assemble different brake drums sized for any type of coupling.
GRFRD implementation for disc brakes
The GR FRD series has been developed to fit disc brake transmissions (FRD).
It is an elastic coupling consisting of:
Standard hub (any of the TRASCO family)
Elastic star
Special hub connected to the brake disc
In addition, it is possible to mount different sized brake discs for any type of coupling.
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