ActionJac™ Worm Gear Jack systems 2016 by NOOK Industries

More catalogs by NOOK Industries | ActionJac™ Worm Gear Jack systems 2016 | 110 pages | 2016-08-25

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Page 72 of ActionJac™ Worm Gear Jack systems 2016

metric trapezoidal screw jacks column strength reference number system metric trapezoidal screw jacks metric trapezoidal screw jacks column strength is the ability of the lift shaft to hold compressive loads without buckling with longer screw lengths column strength may be substantially lower than nominal jack capacity find a point at which the maximum length “l” intersects the maximum load be sure the jack selected is above and to the right of that point if the lift shaft is in tension only the screw jack travel is limited by the available screw material or by the critical speed of the screw refer to the trapezoidal screw technical section for critical speed limitations if there is any possibility for the lift shaft to go into compression the application should be sized for sufficient column strength caution chart does not include a design factor the chart assumes proper jack alignment with no bending loads on the screw effects from side loading are not included in this chart jacks operating horizontally with long lift shafts can experience bending from the weight of the screw the chart below is used to determine the required jack size in applications where the lift shaft is loaded in compression model em05-msj em1-msj em2.5-msj u i ur ir 1,000 model em5-msj em10-msj em20-msj upright inverted upright rotating inverted rotating 200 em20 100 em10 one end fixed one end free 70 50 em5 30 20 10 one end fixed one end supported clevis attached to guide structure em1 7 em05 5 l shaft order code sse 1 l one end fixed one end supported radial bearing 3 2 1 50 100 150 250 350 500 1,000 1,500 b 100 200 300 500 700 1,000 2,000 3,000 c 150 300 450 750 1,050 1,500 3,000 4,500 d 200 400 600 1,000 1,400 2,000 4,000 6,000 both ends fixed top plate attached to guided structure l l travel cw shaft order codes must include a position note both shaft extensions must be specified no accessory sse standard shaft extension position 1 or 2 000 delete shaft extension position 1 or 2 spc special modified shaft extension position 1 or 2 l e and/or b optional e in-line encoder motor or motor mount is required b bellows boots must calculate retracted and extended boot length see page 204-205 p nook tube sensor system pnp n nook tube sensor system npn s or m required s standard no additional description required m modified additional description required motor mounts without motor position 1 or 2 l “l” mm metric trapezoidal screw jacks available lift screw lengths as a major manufacturer of industrial lead screws nook industries stocks a wide selection of trapezoidal screws nook industries has the capacity to make long trapezoidal screws for special applications travel nuts shown in position a for translating screw models u and i use actual travel in mm for rotating screw models ur and ir use l dimension in mm ccw position 1 cw position 2 ccw shaft d a l ir inverted rotating modifier list c em2.5 ur upright rotating refer to product pages for available ratios b both ends supported by clevis ends screw configuration metric trapezoidal screw jacks 300 f standard flange base rotating ur and ir models a travel nut position a b travel nut position b gear ratio a 500 housing configuration translating u and i models t standard threaded end c clevis end p top plate mounting conditions 700 load kn trapezoidal screw model configuration to use this chart 140 em2.5-msj u 6:1 sse-1 80b5-2 ft 580mm bs 56b5 56b14 em05 em05 63b5 63b14 em1 em1 71b5 71b14 em1 and em2.5 em1 and em2.5 80b5 80b14 em2.5 and em5 em2.5 and em5 90b5 90b14 em5 and em10 em5 and em10 100b5 em10 and em20 100b14 em10 and em20 rotating screw jacks can be built with a larger diameter lift shaft for greater column strength online nookindustries.com nook precision actuators the specifications and data in this publication are believed to be accurate and reliable however it is the responsibility of the product user to determine the suitability of nook industries products for a specific application while defective products will be replaced without charge if promptly returned no liability is assumed beyond such replacement 141