Joyce/Dayton Corp. Operation and Maintenance Manual BG 450 Bevel Gear Jacks WARNING! The recommendations in this manual for installation, operation and maintenance must be followed to ensure safe use. All persons responsible for the installation and use of Joyce/Dayton bevel gear jacks must be familiar with the contents of this manual.
Table of Contents Section I – General Information 1-1 Contact Joyce Dayton .....................................................2 1-2 Purpose and Scope .........................................................2 1-3 Receipt of Product ...........................................................2 1-4 Warranty ............................................................................3 1-5 Precautions for Use .........................................................3 1-6 General Installation Instructions .....
1-4 Warranty Seller warrants its products to be free from defects in material and workmanship under normal and proper use in accordance with instruction of seller for a period of one year from the date of shipment to buyer.
6. For systems with more than one bevel gear jack, confirm that the bevel gear jacks and shafts operate without binding or excessive force before power is applied. 7. When directly connecting between bevel gear jacks one must alternate bevel gear jacks with right-hand and left-hand lifting screws to achieve synchronous lift patterns. 8. When fastening the load to a bevel gear jack, make sure the actuator is retracted. This positions the load accurately with respect to the lifting screw centerline.
H. I. J. K. Wiper Seal (1) O-Ring (1, 2, or 3) Shims (as needed) Cover Gasket (1 or 2) 2-3 Sizing Bevel Gear Jacks - BG 450 When sizing a bevel gear jack consideration must be given to the relationship between the load, travel speed, and duty cycle. Use the following procedure to determine the suitability of the BG 450 for your application. Use the steps below to calculate the load, travel speed, and duty cycle. 1. Determine the load in pounds. 2. Determine the velocity in feet per minute. 3.
Section III Drawings 3-1 BG 450 Bevel Gear Jack 6
3-2 Parts list Table 3-2 Parts list – BG 450 Bevel Gear Jack Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Bevel Gear Jack Sleeve (1) Thrust Bearing (2) Gear Mounting Flange (1) BG 450 Gear (1) Screw (12) Screw (16) Bearing Mounting Flange (1) O-Ring (2) Set Screw (6) Upper Thrust Bearing Seal (1) Air Vent (2) Sleeve Cap (1) Bushing (1) Seal (2) Boot (optional) (1) Lifting Screw (1) Grease fitting (4) Protection tube (1) Lifting Nut (1) O Ring, Carrier (1, 2, or 3
3-3 BG 450 Bevel Gear Jack Part Numbers Model Number BG 450 S BG 450 D Static Capacity Upright screw in Compression 218,000 # 218,000# Static Capacity Inverted screw in Tension 218,000# 218,000# Static Capacity Upright screw in Tension 200,000# 200,000# Static Capacity Inverted screw in Compression 200,000# 200,000# Dynamic Load Capacity Use JAX* Software Use JAX* Software Screw Diameter 4 ½” 4 ½” Pitch/Lead .5 Pitch .5 Lead Acme .5 Pitch 1.
3-4 Maintenance Check 1. Check the pinion shaft for excessive backlash (more than 10% angular). If excessive backlash is present contact Joyce/Dayton. The unit should be returned to Joyce/Dayton for service. Only qualified personnel should perform this procedure. 2. Acme threads are the main support members in BG 450 bevel gear jacks. If they wear too thin, the jack could fail. Determine wear by checking jackscrew endplay at least once per month.
3-6 Joyce Dayton Serial Number Tag To obtain product information needed for maintenance, repair and reorder, contact Joyce Dayton Corporation and provide the serial number. Joyce/Dayton Corp P.O. Box 1630 Dayton, Ohio 45401 Phone (800) 523-5204 (U.S. & Canada); (937) 294-6261 Fax (937) 297-7173 www.joycedayton.com E-mail: sales.jacks@joycedayton.com ©2010 Joyce/Dayton Corp.
