Types

PRINCIPLES OF OPERATION OF WORM SCREW JACK

The Jack housing contain the Worm Gear and Worm Screw. Worm Screw drives the Worm Gear and is supported on tapered roller bearings, the Worm Gear is supported on ball bearings. The internal part of the Worm Gear constitutes the Drive Sleeve (Nut) of the Work Screw, Nut rotation causes Work Screw to translate or rotate depending on Jack type.


Screw Jack Types

The Jack housing is casted in nodular iron, Worm Screw is made in high tensile Stainless Steel, Worm Gear is made in high tensile bronze and Work Screw is made in high tensile steel. Work Screw thread is trapezoidal.

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These Jacks use the same worm gear set arrangement as Trapezoidal Screw Jacks with the addition of a high efficiency ball nut. The Work Screw is a ball Screw made in hardened high tensile steel.

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These Jacks are suitable for application in corrosive environments. The Jack housing is casted in St.St. AISI 316 (EN1.4404), Worm Screw is made in high tensile Stainless Steel, Worm Gear is made in high tensile Bronze. On the Trapezoidal Screw Jack the Work Screw is made in St.St. AISI 316 (EN1.4404). On the Ball Screw Jack the Work Screw is made in two parts, a internal ball screw made in hardened high tensile steel and an extending terminal made in St.St. AISI 316 (EN1.4404). Jacks are provided with special sealing to prevent internal parts from dust and water contamination.
In these Jacks the Worm Screw and Gear are replaced with a two pinions and bevel gear system. These units are typically used when high speed and duty cycles are required. This system allows a lower wear of the parts and lower ratios, but requires higher power rating.

Contacts

  • Address: 10060 S.SECONDO di PINEROLO
    VIa VALPELLICE, 63 ITALIA

  • Phone: +39 0121 501 855

  • Fax: +39 0121 501 857

  • Email: weingrill@weingrill.it