Over 140 kNm;
1,240,000 in.lb.

Optimized disc profile for even stress distribution. Proprietary disc coating to prevent fretting and corrosion. Designed for years of dependable, low-maintenance performance.

•	Industry leader in power density
•	API-671 compliant
•	Best for reduced moment applications

Up to 600 kNm;
5,300,000 in.lb.

These torsionally stiff, light weight couplings are capable of transmitting high torques at high speeds while accepting significant levels of angular, radial, and axial misalignment. They are easy to install, suitable for hostile environments, require no lubrication and feature a high torque to weight ratio. Specific designs are available which meet the customer’s exact requirements. Standard units are compliant with API 671 (American Petroleum Institute) and ATEX 94/9/EC.

•	No maintenance
•	Standard and reduced moment designs available
•	Capable of being torsionally tuned to suit specific machinery requirements

The exclusive use of the involute helicoid thread form on the worm and gear provides for high efficiencies and long service
life on draglines and shovels. The hardened, ground and polished alloy steel worm develops a smooth, work hardened surface on the bronze gear. For this reason, the worm gears wear in and improve with prolonged service while other gears are wearing out.

•	Automatic engagement and disengagement
•	Delayed engagement produces a “no load start”
•	No slippage at full running speed
•	Controlled soft-start acceleration
•	100% efficient at rated speed
•	Standard, spring control, and deep pocket models
•	Protection against shock loads during start-up

High-speed backstops for internal and external gear reducer mounting, Models FSO, HSB, FS-50, RSCI, and RIZ

•	13 different sizes
•	Bore range: 6 to 508 mm
•	Torque range: 2.1 to 952000 Nm
•	Designed for rebuilding – reducing long-term operation costs
•	Removable torque arm – easier installation
•	Grease labyrinth seals – protect internal components
•	Formchrome sprags – longer wear life
•	Free action retainer – tolerates larger concentricity fl uctuations
•	Full range of options includeing OSHA covers, set collars and restraint keys

 

Boston Gear's 800 Series contains a focused selection of compact, heavy duty helical gear drives that offer long-life performance and simplified maintenance. The 800
Series provides a functional
interchange for SEW Eurodrive
and other European manufacturers' helical gear drives, making it uniquely practical for replacement
applications.

•	Automatic engagement and disengagement
•	Delayed engagement produces a “no load start”
•	No slippage at full running speed
•	Controlled soft-start acceleration
•	100% efficient at rated speed
•	Standard, spring control, and deep pocket models
•	Protection against shock loads during start-up

Spring-applied, hydraulically released modular disc brake

•	300 kN Braking Force
•	On-site torque adjustment to precisely match application needs
•	“park-off” facility for fast pad changing without special tools
•	Spring-Applied – low pressure air release
•	Controlled reversal of belt
•	Automatic release of belt tension
•	Stops in either direction