Overview
The Gates 8MX-45S-21 is a high-precision Poly Chain GT2 synchronous sprocket engineered for industrial power transmission systems. Manufactured by Gates to deliver perfect fit, precise design, easy installation, and simple removal, this sprocket is essential for maintaining optimal performance in belt-driven machinery and automated equipment. The unit arrives new in box, ready for immediate installation in your motion control system.
Key Features
- Statically balanced to ISO 1940 (1973) class G16 for smooth, vibration-free operation
- Taper-Lock bore design (1/2 to 2-1/8 inch) accommodates multiple shaft diameters without modification
- Full split bushing allows easy installation and removal
- Poly Chain GT2 design keeps overhung load below manufacturers’ recommendations
- Durable ductile iron construction ensures long service life
- Compact design saves shaft space and keeps load closer to bearing
Technical Specifications
- Grooves: 45
- Pitch: 8mm
- Pitch Diameter: 4.511 inches
- Outside Diameter: 4.448 inches
- Bore Range: 1/2 to 2-1/8 inch (Taper-Lock)
- Face Width: 1-1/4 inch
- Flange Diameter: 4.91 inches
- Belt Width Compatibility: 21mm Poly Chain
- Material: Ductile Iron
- Bushing Style: 2012
- Maximum Rim Speed: 6,500 fpm
- Balance Standard: ISO 1940 (1973) Class G16
Typical Applications
The Gates 8MX-45S-21 is ideal for:
- Industrial conveyor systems and material handling equipment
- Automated manufacturing machinery requiring synchronous belt drive
- Packaging and processing equipment
- Motion control systems demanding precise speed regulation
- OEM equipment and retrofit installations
- Any application requiring 8mm pitch, 21mm wide belt synchronization
Compatibility & Replacements
Compatible With
- Gates Poly Chain GT2 belts (8mm pitch, 21mm wide)
- Taper-Lock bushings (2012 style, 1/2 to 2-1/8 inch bore)
- Industrial power transmission systems with standard GT2 drive design
- OEM conveyor and machinery manufacturers using Poly Chain GT2 drives
Replaces / Drop-In Replacement For
- Gates part number 77182045 (internal Gates product ID)
- Baldwin Supply part 8MX-45S-21 (direct equivalent)
- Other equivalent 45-groove, 8mm pitch Poly Chain GT2 synchronous sprockets
Works With
- Gates Poly Chain GT2 timing belt systems
- Standard ISO taper-lock bushing technology
- Industrial automation belt drive architectures
- Power transmission design software compatible with GT2 specification standards
