- Standard 200 PPR, quadrature mount on input shaft
- Ring Style 60 PPR, quadrature mounts to C-faced motor flange
Joyce Bevel Gear® Jacks, available in 7.5-ton to 100-ton static capacities, offer higher efficiency and greater speed than other mechanical screw jacks. As an added benefit, bevel gear jacks also act as miter boxes, making them an ideal choice for multi-jack systems. As many as three output shafts may be specified for mounting motors, limit switches, readout devices and other accessories. Bevel gear jacks with single lead screws (S series) provide the benefits of a self-locking screw, and bevel gear jacks with double lead screws (D series) offer even greater travel speed.
Joyce/Dayton bevel gear jacks are available in four capacities:
Parts list and illustrations are included in the O&M Manual. Serial numbers are attached to the product housing.
Click on the part number to reveal additional informaton about actuator designs and shaft codes.
|Joyce Bevel Gear® Jacks|
|U= Upright||I= Inverted|
|S= Translating||Keyed for Non Rotation||N= Travelling Nut|
|Bevel Ball Actuator Rise|
|Rise is travel expressed in inches and not the actual screw length|
|Three shaft codes must be specified for each jack. Electronic and mechanical limit switches may be substituted for the shaft code per the tables on this page.|
|XXXX- Input shaft no required|
|When ordering with only one input shaft, it is recommended to order the following configuration: XXXX-STDX-XXXX|
|X= Standard Jack, no additional options|
|X= Additional Specification Required (comment as necessary)|
|B= Protective Boot|
|D= Dual Protective Boot|
|F1= Do Not Paint|
|F2= Epoxy Paint|
|F3= Outdoor Paint processes|
|L= Left hand Screw|
|Model||Dynamic Capacity||Upright Assembly: Screw-in compression/ |
inverted assembly: screw-in tension
|Upright Assembly: screw-in tension/ inverted assembly: Screw-in compression||Screw Dia.||Screw Pitch/Lead||Bevel Gear Ratio||Pinion Turns for 1" Travel||Pinion Torque (In. Lbs.)||Screw Torque||Jack Efficiency||Jack† Cooling Time||Base Weight (Lbs.)||Add for Each Inch of Travel (Lbs.)|
or contact Joyce /
|14,000 lbs.||14,000 lbs.||1 ½"||.375 STUB ACME||2.69:1||7.18||.059W*||.151W*||38.5%||38 min.||42||0.8|
|BG150-D*||14,000 lbs.||14,000 lbs.||1 ½"||.250P / .500L STUB ACME 2C||2.69:1||5.38||.066W*||.169W*||45.6%||38 min.||42||0.8|
|BG250-S||30,000 lbs.||30,000 lbs.||2 ½"||.500P ACME 2C||2.15:1||4.31||.111W*||.227W*||34.2%||82 min.||140||2.6|
|BG250-D*||30,000 lbs.||30,000 lbs.||2 ½"||.375P / .750L ACME 2C||2.15:1||2.87||.133W*||.272W*||42.6%||82 min.||140||2.6|
|BG375-S||66,000 lbs.||40,000 lbs.||3 ¾"||666P ACME 2C||3.52:1||5.29||.098W*||.329W*||31.5%||192 min.||230||4.1|
|BG375-D*||66,000 lbs.||40,000 lbs.||3 ¾"||.666P / 1.333L STUB ACME||3.52:1||2.64||.134W*||.448W*||46.0%||192 min.||230||4.1|
|BG450-S||218,000 lbs.||200,000 lbs.||4 ½"||.500P ACME 2C||3:1||6||.125W*||.356W*||21.9%||262 min.||650||5.5|
|BG450-D*||218,000 lbs.||200,000 lbs.||4 ½"||.500P / 1.00L ACME 2C||3:1||3||.154W*||.438W*||35.5%||262 min.||650||5.5|
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 jacks are self-locking.
*W: Load in Pounds.
Pinion Torque: The torque required to continuously raise a given load.
Screw Torque: The torque required to resist screw rotation (translating jack design) and traveling nut rotation (keyed for traveling nut design).
Lead: The distance traveled axially in one rotation of the lifting screw.
Pitch: The distance from a point on the screw thread to a corresponding point on the next thread, measured axially.
†: Cooling time based on time to cool from 200°F to 70°F (ambient).