Sterling TSI Co Ltd.

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    ABOUT

    SELF CENTERING STEADY RESTS

    Steady Rest are normally used efficient machining of long slender shafts. On conventional steady rest three screws 120° apart are adjusted manually. This type of centering process is not reliable and depends on operator's skill.

    FAR self centering steady rest work on an entirely different principle. Three rollers hold the work piece at point approx 120° apart. These rollers move such that they always inscribe concentric circles between them. This feature along with the internal compensating system prevents the dislocation of work piece center under changing clamping pressure. This results in high centering accuracy By mounting accordingly these steady rests can be used for turning outside diameters, inside diameters, facing, drilling, grinding, induction hardening etc.

    Steady rest can be operated either hydraulically or pneumatically with the only difference being the clamping cylinder bore.

    In FRU series the clamping cylinder is fixed as axial extension at the rear end. With FRU-B series the cylinder is fixed to the side of the steady rests to save mounting space.

    MODELS



    FEATURES

    STEADY REST TYPE   FRU1 FRU2 FRU3 FRU3.1 FRU3.2 FRU4 FRU5 FRU5.1 FRU6 FRU7 FRU8
    Standard Features:
  • Safety Valve
  • Stroke Control
  • 1 set swarf guard 3-piece
  • Connection for compressed air
  • A 222 299 457 465 486 624 710 746.5 980 1240 1430
    B 137.5 195 305 316 332 437 500 530 709 900 1020
    C 51 70 115 123 138 146 178 198 215 320 375
    D 64 85 135 135 135 240 270 270 330 440 500
    E 118 170 262 262 262 365 400 400 610/640 650 855
    F 155 205 290 290 290 400 450 450 705 710 930
    G 55 70 85 85 85 110 145 145 145 162 190
    I 33 33 37 37 37 37 37 37 37 60 60
    J 24 42 52 52 52 67 83 83 83 94 110
    K 20 35 45 45 45 60 75 75 75 82 100
    L 12 19 25 25 25 25 29 29 29 32 32
    M 19 35 47 47 47 52 62 62 80 100 100
    N 10 21 25 25 25 32 36 36 42 55 55
    O 84.5 104 149 149 154 187 210 216.5 271 340 410
    P1 84 102 137 137 137 165 165 165 200 238 238
    P2 66 72 90 90 90 102 102 102 120 143 143
    P3 66 75 94 94 94 110 110 110 135 158 158
    P4 130 190 285 280 323 425 478 512 680 820 990
    R 50.5 72 119 124 138 172 209 229 290 398 402
    S 11 14 18 18 18 23 23 23 27 27 35
    T 70 70 102 102 102 126 144 144 158 190 230
    V 42.5 60 92 99 103 128 160 180 175 283 290
    Y 19 19 19 19 19 19 19 19 19 19 19
    Centering range without chip guard. U1 4 8 12 20 50 30 45 85 125 200 230
    U2 64 101 152 165 200 245 310 350 460 530 630
    Centering range with 3 piece chip guard. U1 11 16 16 20 50 30 45 85 125 200 230
    U2 64 101 152 65 200 245 310 350 460 530 630
    Cylinder Bore. d 30 50 80 80 80 100 100 100 130 150 150
    Hyd. Connection. (BSP) h 1/4" 1/4" 1/4" 1/4" 1/4" 3/8" 3/8" 3/8" 3/8" 3/8" 3/8"
    Operating pressure. Min/Max bar 6/50 8/60 8/60 8/60 8/60 8/60 8/80 8/80 8/70 6/70 6/70
    Max. clamp force/roller daN 100 350 1000 1000 1000 1500 2000 2000 3000 4000 4000
    Clamping press/roller at 15 bar daN 35 100 250 250 500 500 500 500 670 900 900
    Centering accuracy over the whole clamping range mm 0.02 0.02 0.04 0.04 0.04 0.05 0.06 0.06 0.06 0.08 0.08
    Repeatability mm 0.005 0.005 0.007 0.007 0.007 0.007 0.01 0.01 0.01 0.02 0.02
    Max. peripheral speed. m/min 850 950 800 800 725 725 670 670 525 570 570
    Weight Approx. kg 7 18.5 48 48 50 104 155 155 430 1000 1300