Screw Jack
High-lead Ball Screw Jack
Outline
High-lead type ball screw jack using a ball screw shaft (lifting screw) which is best for high-speed operation
Features
- – Capacity: 4kN~200kN
- – The use of the high-lead ball screw achieves even faster lifting speed than standard ball screw jacks at the same input rotation speed.
- – This type uses rolling friction between the nut and lifting screw, and its efficiency is approximately 3 times higher than that of the trapezoidal screw type, realizing energy-saving operation.
- – We can also manufacture a jack with anti-rotation mechanism which prevents its lifting screw from drag turning.
- – Wide-ranging options are available, including dustproof bellows to protect the lifting screw, trunnion base, limit switch for control, and RC encoder.
- – This type of jack does not have a self-locking function, so it is required to install a brake.
Standard Specifications
| Series/Size Code | RSF | J0F | J1F | J2F | J3F | J4F |
|---|---|---|---|---|---|---|
| Capacity | 4kN | 10kN | 25kN | 50kN | 100kN | 200kN |
| Lifting screw diameter | 16mm | 20mm | 25mm | 36mm | 40mm | 50mm |
| Lifting screw lead | 16mm | 20mm | 25mm | 36mm | 40mm | 50mm |
| Worm gear ratio | 5 | 5 | 6 | 6 | 8 | 8 |
| Effciency | 0.64 | 0.64 | 0.61 | 0.61 | 0.59 | 0.6 |
| Maximum allowable power per jack | 0.63kW | 0.75kW | 1.3kW | 2.5kW | 3.7kW | 6kW |
| Input shaft torque at no load (b) | 0.15N・m | 0.3N・m | 1N・m | 2N・m | 3N・m | 5N・m |
| Torque coefficient (a) | 0.80 | 1.0 | 1.09 | 1.56 | 1.34 | 1.66 |
| Required input torque at maximum load | 3.4N・m | 10N・m | 28N・m | 80N・m | 137N・m | 337N・m |
| Required input torque at maximum load | 1.8N・m | 6.6N・m | 16N・m | 47N・m | 61N・m | 156N・m |
| Speed coefficient (c) (screw lead per rotation of input shaft) |
3.2mm | 4mm | 4.17mm | 6mm | 5mm | 6.25mm |
| Maximum allowable input rotation speed (over 1000min-1 must be oil lubruicated) | 2000min-1 | 1800min-1 | 1800min-1 | 1800min-1 | 1800min-1 | 1800min-1 |
| Anti-rotation key torque at maximum load | 1.5N・m | 5N・m | 15N・m | 45N・m | 100N・m | 250N・m |
| Input shaft allowable overhang load | 300N | 300N | 450N | 700N | 1200N | 1200N |
| Amount of filled grease | Maintenance-Free | 0.15kg | 0.6kg | 0.9kg | 1.5kg | 3kg |
| Operating temperature range | -15〜80℃ | -15〜80℃ | -15〜80℃ | -15〜80℃ | -15〜80℃ | -15〜100℃ |
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Screw Jack
