Maximum Torque Transmission & Rigid Shaft Alignment: GY / GYS / GYH Flange Rigid Couplings

The Apexcoupling GY, GYS, and GYH Series Flange Rigid Couplings are heavy-duty, fixed-type steel flange couplings engineered for heavy machinery, power transmission drives, metallurgical equipment, and industrial motor-to-gearbox connections. Drop-forged from premium 45# carbon steel with reinforced flange faces and secured with high-tensile fasteners, these rigid sleeve couplings deliver exceptional torsional rigidity, load capacity, and operational stability under heavy torque requirements.

Manufactured in accordance with GB/T 3582-1997 shaft bore and keyway standards, the GY series features two distinct centering mechanisms to match specific maintenance layouts: the GY Type utilizes precision reamed fitted bolts for concentric alignment without needing axial shaft movement during installation, while the GYS Type incorporates a male/female spigot (recessed groove) centering structure for convenient machining and high radial alignment accuracy. Featuring H7 precision-machined inner bores, optional cylindrical or tapered shaft holes, and a protective black oxide surface finish, Apexcoupling provides robust rigid coupling solutions for critical industrial drives.

Core Product Advantages & Features

• Drop-Forged 45# Carbon Steel Flanges: Forged 45# steel bodies with thickened flange plates provide maximum torsional rigidity and high tensile strength under heavy load spikes.

• Dual Alignment Centering Options (GY vs. GYS):

  • GY Series (Reamed Bolt Centering): Reamed bolt hole alignment allows mounting and dismounting without moving connected shafts axially.

  • GYS Series (Spigot/Recess Centering): Male-female flange centering ensures exact concentricity for high-load installations.

• High-Strength Fastener Assembly: Secured with high-grade alloy steel bolts designed to withstand high shear and tensile stresses without loosening under heavy vibration.

• Standard GB/T Keyways & H7 Bore Fits: Bores are precision-turned to H7 tolerances, supporting parallel keyways (GB/T 3582-1997 standard), tapered bores, and custom keying specs.

• Simple, Maintenance-Free Operation: Compact, solid mechanical layout with no wearable internal elements ensures long, reliable service life in demanding environments.

• Versatile Industry Applications: Ideal for CNC machines, metallurgical equipment, food processing machinery, wood processing lines, printing equipment, and railway drives.

Technical Specifications Table