Bevel Ball Actuators
9Pages

Bevel Ball Actuators To properly size actuators, follow the design tips found on page 161, and refer to the Column Load and Life Expectancy charts (pages162 and 163). Use JAX® software to determine the dynamic capacity of actuators, or contact Joyce/Dayton. Joyce high-efficiency bevel ball actuators (BB) are designed for near-continuous duty operation. BB series actuators provide higher speeds and less heat generation than other mechanical actuators and require a brake motor or other external locking device to hold position. They also offer more precise positioning and repeatability than hydraulic cylinders. Bevel ball actuators are available in 7.5-ton to 100-ton static capacities and are able to attain travel speeds of up to 48 feet per minute. The ball screw and ball nut have a fully predictable J-10 life expectancy. Standard jacks have right hand ball screws. Left hand ball screws are available as an option. A threaded end condition is standard on translating bevel ball actuators; load pad and clevis ends are also available. KFTN designs have a plain turned end condition. Bevel ball actuators are ideal for either single operation or multi-actuator systems. As many as three output shafts may be specified for mounting motors, limit switches, readout devices and other accessories. See page 195 for an example of a bevel gear jack system. Note that right hand and left hand screw threads are alternated in the layout. Many options are available including oversized ball bearings, which can be specified to reduce endplay between ball screw and ball nut. All jack designs can be fitted with protective boots. Joyce/Dayton can customize bevel ball actuators to meet your requirements. Joyce/Dayton offers Bevel Ball Actuators in the following designs: • Translating • Keyed for traveling nut (KFTN) A guide for ordering is on page 160. 2D and 3D models available on website • Ordering information on page 160

Bevel Ball Actuators ORDERING INFORMATION Instructions: Select a model number from this chart. Joyce Bevel Ball Actuators Bevel Ball Actuator Rise Screw Stops (p. 10) and Boots (p. 170) Rise is travel expressed in inches and not the actual screw length. Screw stops are optional on bevel ball actuators. When specified, the closed height of the jack and protection tube length may be increased. Evaluate column load (p. 162). Evaluate ball nut life (p. 163). Detailed product information (pp. 164-167). Right hand ball screws standard. Sample Part Number: BB225U3S-12-XXXX-STDX-XXXX-B Actuator...

Bevel Ball Actuators Specifications and Design Tips Model BB150 BB225 BB300 BB400 Dynamic Capacity Please use JAX ® V2 software or contact Joyce/Dayton Static Capacity (Lbs) Upright Upright Assembly Assembly Screw in Screw in Tension Compression 15,000 30,000 42,500 200,000 Inverted Assembly Screw in Tension Bevel Gear Ratio Pinion Turns for 1" Travel Pinion Torque (Raising) Pinion Torque (Holding) Screw Torque Actuator Efficiency Add for each inch of travel Inverted Assembly Screw in Compression BB225 30,000 30,000 2.25/.50 2.15:1 4.31 BB300 70,000 42,500 3.00/.66 3.52:1 5.34 BB400 200,000...

This chart includes a 2:1 Factor-of-Safety based on the Euler-Johnson equation for column loading (Oberg, Erik et al: Machinery’s Handbook, 24th Edition. c. 1992 Industrial Press Inc.) The horizontal portion of each line represents the jack’s maximum static capacity. Screw Length (inches) Bevel Ball Actuators Column Loading Chart Bevel Ball Actuators COLUMN LOADING 2D and 3D models available on website • Ordering information on page 160

Bevel Ball Actuators LIFE EXPECTANCY 5 Inches of Travel (Millions) Inches of Travel (Millions) Load on Jack (pounds) Load on Jack (pounds) Inches of Travel (Millions) Inches of Travel (Millions) Load on Jack (pounds) Load on Jack (pounds) 2D and 3D models available on website • Ordering information on page 160

BEVEL BALL ACTUATORS PLAIN END LOAD PAD THREADED END MALE CLEVIS END END CONDITIONS (SHOWN AT MINIMUM CLOSED POSITION) Typical Plan View Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on page 160

BEVEL BALL ACTUATORS THREADED END MALE CLEVIS END END CONDITIONS (SHOWN AT MINIMUM CLOSED DIMENSIONS) Typical Plan View Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on page 160

BEVEL BALL ACTUATORS THREADED END MALE CLEVIS END END CONDITIONS (SHOWN AT MINIMUM CLOSED DIMENSIONS) Typical Plan View Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on page 160

BEVEL BALL ACTUATORS THREADED END MALE CLEVIS END END CONDITIONS (SHOWN AT MINIMUM CLOSED DIMENSIONS) Upright traveling nut _ Inverted traveling nut Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on page 160