Bevel Gear Jacks
10Pages

Bevel Gear Jacks Joyce/Dayton offers Bevel Gear Jacks in several designs including: • Translating • Keyed for non-rotation • Keyed for traveling nut (KFTN) A guide for ordering is on page 150. 2D and 3D models available on website • Ordering information on page 150

Bevel Gear Jacks ORDERING INFORMATION Instructions: Select a model number from this chart. Joyce Bevel Gear® Jacks Bevel Gear Jack Rise BG450S BG450D Follow the design tips (pp. 151-154). Detailed product information (pp. 155-158). Right hand screw threads standard. 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 gear jacks. When specified, the closed height of the jack and protection tube length may be increased. Sample Part Number: BG150SU2S-12.25-STDX-STDX-STDX-X Jack Configuration Additional...

Bevel Gear Jacks SPECIFICATIONS AND DESIGN TIPS Model Dynamic Capacity Static Load Capacity Upright Assembly: Upright Assembly: screw-in screw-in tension/ compression/ Inverted Inverted Assembly: Assembly: Screw-in screw-in tension compression Bevel Gear Ratio Pinion Pinion Turns for Torque 1" Travel (In. Lbs.) Screw Torque Jack Efficiency Jack† Cooling Time Add for Each Inch of Travel (Lbs.) .500P / 1.00L 3:1 3 .154W* ACME 2C Important Note: *Not self-locking, may lower under load. Brake motors or external locking systems are recommended. D: Double Lead Screws. S: Single Lead Screws. These...

Bevel Gear Jacks Application Information AND Thermal GraphS In many applications, Joyce Bevel Gear® jacks are more efficient and faster than wormgear driven jacks. To determine the suitability of a bevel gear jack for your application, use the steps below to calculate load, travel speed and duty cycle. Step 6 Plot the points for PV and T on the appropriate graph (below or on the next page). If the point falls below the line, the application is satisfactory. If it is above the line, recalculate T for the next larger size jack. Each jack size has a different cooling time (p. 151). Step 1...

Bevel Gear Jacks Example AND Thermal Graphs Example: A 5000-pound load must be raised 30 inches in 15 seconds. The load remains in position for two minutes. It is then lowered and remains lowered for 30 seconds. The cycle begins again. Determine the appropriate bevel gear jacks and calculate horsepower required. Step 1 Load = 5000 pounds Step 2 Velocity = 30 inches in 15 seconds = 10 fpm Step 3 Duty cycle = Time on / Time off Time on = 15 seconds up +15 seconds down = 30 seconds = 0.5 min Time off = 2 minutes up + 30 seconds down = 2 minutes 30 seconds = 2.5 minutes Step 6 The point for PV,...

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) Joyce Bevel Gear® Jacks Column Loading Chart Bevel Gear Jacks COLUMN LOADING 2D and 3D models available on website • Ordering information on page 150

BEVEL GEAR JACKS Upright keyed TYPE 1 TYPE 2 TYPE 3 TYPE 4 PLAIN END LOAD PAD THREADED MALE END CONDITIONS (SHOWN AT MINIMUM CLOSED POSITION) Typical Plan View END CONDITIONS (SHOWN AT MINIMUM CLOSED POSITION) (DOES NOT APPLY TO INVERTED KEYED JACK) Inverted keyed 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 150

BEVEL GEAR JACKS Upright keyed PLAIN END LOAD PAD THREADED MALE MINIMUM CLOSED DIMENSIONS) Typical Plan View Inverted keyed MINIMUM CLOSED DIMENSIONS) (DOES NOT APPLY TO INVERTED KEYED) 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 150

BEVEL GEAR JACKS Upright keyed 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 150

BEVEL GEAR JACKS THREADED END MALE CLEVIS END END CONDITIONS (SHOWN AT MINIMUM CLOSED DIMENSIONS) 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 150