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271/281 Series High Load Lab Jacks

271/281 Series High Load Lab Jacks
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901 Email: sales@newport.com • Web: newport.com M a n u a l P o s i t i o n i n g MANUAL ROTATION AND TILT STAGES MANUAL LINEAR STAGES MANUAL ACTUATORS MANUAL FIBER ALIGNMENT 271/281 Series High Load Lab Jacks 271 281 Model 271 and 281 Lab Jacks are uniquely designed to provide smooth, stable height adjustment and high load capacity. Conventional scissors and dual-pantograph jacks lift by decreasing the distance between crossed members and are inherently less stable at higher elevations. In contrast, Newport’s innovative design employs three orthogonal hinges that straighten to form a box, becoming more stable with increasing height. The side mounted height adjustment controls a stout drive screw connecting the pivot pins of the broad side hinges. The end hinge prevents tilting or swaying and ensures only vertical motion. Specifications 271 281 Load Capacity [lb (N)] 200 (890) 300 (1334) Parallelism (mrad) 3 3 Minimum Height [in. (mm)] 2.5 (63.5) 3 (76.2) Maximum Height [in. (mm)] 4.25 (107.9) 6 (152.4) 271 281 2.5 (50) 3 4 5 (100) 6 (150) 300 200 100 0 LAB JACK HEIGHT [in. (mm)] LOAD CAPACITY (lb) 1334 890 445 0 LOAD CAPACITY (N) 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 281 271 0 2 4 6 8 6 5.5 5 4.5 4 3.5 3 2.5 NUMBER OF REVOLUTIONS LAB JACK HEIGHT (in.) 271 281 Ordering Information Model Platform Size [in. (mm)] 271 4.375 x 6.5 (111.1 x 165) 281 6.5 x 9.5 (165.1 x 241.3) • Unique orthogonal hinges minimize wobble, tilt, and twist • 3-mrad parallelism • High load capacity without creep • Smooth elevation of up to 300 lb (1334 N) loads • English and metric compatible Related Products Adjustable-height Rod Platforms (see page 720) Fixed-height Platforms (see page 737) Availability – Guaranteed on select items @ newport.com

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Email: sales@newport.com • Web: newport.com Model 271 4.375 (111.1) 2.5 (63.5) TO 4.25 (108) OPERATING RANGE 4 SLOTS, ø.268 CLR .625 TYP (7.1) (15.9) 4.75 (120.7) 6.50 (165.1) 15 HOLES, 1/4-20 THD, 1.000 SPACING (M6 THD 25mm SPACING FAR SIDE) .25 TYP 1.968 (50) [2.00 (50.8) SPACING FAR SIDE] Model 281 36 HOLES, M6 THD, (25.0) SPACING (50.8) (25.4) TYP 9.50 (241.3) 6.50 (165.1) (12.7) TYP 6.50 (165.1) 4 SLOTS, ø(7.1) CLR 3.00 (76.2) TO 6.00 (152.4) OPERATING RANGE 36 HOLES, 1/4-20 THD, 1.000 SPACING 1.968 1.00 TYP 9.50 (241.3) 6.50 (165.1) .50 TYP 6.50 (165.1) 4 SLOTS, ø.268 CLR See our...

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