Industrial screwjacks lift and position
A
Motion Drives and Controls product story
Edited by the Engineeringtalk editorial team
Dec 3, 2007
Competitively priced industrial screwjacks come with a comprehensive choice of options and accessories to suit specialised applications, including low backlash versions.
Motion Drives and Controls has two new ranges of competitively priced industrial screwjacks for moderate- to heavy-duty vertical lift and positioning applications.
Manufactured by the Italian power transmission specialist MTI (Marzorati Trasmissioni Industriali), the SJM and MAR series screwjacks cover a broad selection of standard configurations based on load and speed requirements with a comprehensive choice of options and accessories to suit specialised applications including low backlash versions.
The SJM series is available in six module sizes based on a 30 to 100mm nominal centre distance between input shaft and vertical output shaft.
Load ratings through the range are from 10 to 200kN with stroke lengths up to 6m.
Three standard reduction ratios are available for slow, normal and fast operation to allow vertical speeds up to 3m/min with a choice of four standard spindle and drive nut configurations to drive the load in tension or compression.
Single or double keyed input shafts, or B5/B14 motor mounting for IEC size 56 to 132 motors are also available.
The SJM series is built for long life with 18 NiCrMo 5 UNI 7846, case-hardened steel worm screws and C40 threaded steel drive shafts with bronze wheel and nut components.
The heavy duty bearing system and all contacting parts are fully lubricated, and the robust and durable housing is cast iron for the larger sizes and aluminium for the 10kN rated size.
The larger MAR series is available in four module sizes based on a 50 to 200mm centre distance from input shaft to vertical output shaft.
Load ratings are from 30 to 1000kN with stroke lengths to 4.5m.
A comprehensive selection of options are available for both ranges including bellows protection, protective tubes incorporating lubricant reservoir, anti rotation devices, wear control indicator and inductive limit switches.
Special versions with longer stroke lengths, modified mechanical interfacing and other customised features are available to order.
Both SJM and MAR ranges are supported with comprehensive sizing and ordering information brochures available in hard copy or PDF from Motion Drives and Controls.
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