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BETA 4 
Beta 4
FOUR ROLL, DOUBLE PINCH
with brute power and built to last!
The Beta 4 is designed to roll steel above 25mm / 1.000" thick with yield strength of 350N/mm² / 50,000 psi to 1.4 the top roll diameter of the machine. COMAL believes that to assure positive results of the function and durability of the roll when it is purchased with the intention of rolling such thick materials day in and day out, meaning 16+ hours shifts, the slide and block system is the answer. COMAL accepts the fact that an orbital path system for the bending rolls' movement with linkage style mechanisms may be used (as in our Kappa design). The fact remains that line contact bearings are inferior, for wear and load carrying capacity, when compared with that of large surface area contact bearings.
 
Comal is also ready to provide our customers with a choice. If you request, we will offer you a Kappa 4 with the orbital motion system having the same capacities of the Beta 4 machines listed below, at the lower price.
The capacities you read at the end of this page are TRUE RATINGS of the machines. They are clearly specified at 50,000 psi or 350 N/mm2 material YIELD STRENGTH and at which diameter the machine will perform at the specified thickness on its FULL ROLLS' LENGTH. Also presented are the capacities at 36,000 psi/ 250N/mm² for comparison with other suppliers' machines, which may be rated at this yield strength and 3 to 5 times the top roll diameter! Cone bending on these machines will require you to reduce the machine capacity by 25% on thickness and length. For more information concerning cone bending contact our sales engineers.
Machine Standard Features:
  • Frame built of laser cut high strength steel, welded, stress relieved and sand blasted.
  • All UL listed GE electrical components or equivalent installed in a UL listed NEMA 12 equivalent electrical cabinet

with master breaker

  • Hardened rolls to HRC 54-56
  • Hydraulic unit by Rexroth and valves by Aron
  • .Top and pinching rolls are powered individually with hydraulic motor/ epicylic gear reducer sets.
  • Hydraulic drop-end
  • Automatic rolls paralellism by a micro processor
  • Tilting of the bending rolls by means of proportional valves and PLC
  • Top roll hydraulic balancing system
  • Bending rolls assembled on heavy duty SKF bearings
  • Centralized lubrication by means of a hand pump
  • Cone bending device
  • Tilting of bending roll directly from controls console
  • Separate controls console on wheels
  • Four digital readouts (two for each bending roll)
  • Safety devices and operating manual according to CE norms
Optional Features and Equipment
  • Polished, ground or chrome plated rolls
  • Powered bending rolls each with its individual hydraulic motor/ epicyclic gear reducer
  • Variable speed
  • NC and CNC options
  • Vertical hydraulic support max. Ø 2500 mm/ 98” & max. weight 1600 Kg/ 3530 lbs
  • Vertical hydraulic support max. Ø 3600 mm/ 141” & max. weight 2200 Kg/ 4850 lbs
  • Vertical hydraulic support max. Ø 4300 mm/ 170” & max. weight 5000 Kg/ 4850 lbs
  • Hydraulic side-support Max. 1500 Kg/ 3310 lbs
  • Hydraulic side-support Max. 3000 Kg/ 6615 lbs
  • Hydraulic side-support Max. 4200 Kg/ 9262 lbs
 
RATED AT 50,000 PSI or 350N/mm² MATERIAL YIELD STRENGTH
AND ROLLING AT FULL USEFUL LENGTH (1.4; 3 &5xTR ARE W/PRE-BENDING; 10xTR IS ROLLING ONLY)
 
  THICKNESS CAPACITY WHEN ROLLED USEFUL TOP & PINCH BENDING MACHINE    MACHINE DIMENSIONS & WEIGHT  
                 PART DIAMETER IS: ROLL ROLLS Øs  ROLLS Øs WORKING
MODEL 1,4xTR 3xTR 5xTR  10xTR LENGTH (TR) (BR) HEIGHT LENGTH WIDTH HEIGHT WEIGHT POWER
   
B4/480/21 32mm 41mm 45mm 48mm 2100mm 480mm 440mm 1850mm 5900mm 2900mm 2800mm 29000Kg 30Kw
  1.260" 1.614" 1.772" 1.890" 82" 18.898" 18.898" 73" 232" 114" 110" 63945 lbs 40HP
B4/480/26 25mm 32mm 35mm 37mm 2600mm 480mm 440mm 1850mm 6400mm 2900mm 2800mm 32500Kg 30Kw
  0.984" 1.260" 1.378" 1.457" 102" 18.898" 18.898" 73" 252" 114" 110" 71665 lbs 40HP
B4/480/31 20mm 26mm 28mm 30mm 3100mm 480mm 440mm 1850mm 6900mm 2900mm 2800mm 36500Kg 30Kw
  0.787" 1.024" 1.102" 1.181" 122" 18.898" 18.898" 73" 272" 114" 110" 80485 lbs 40HP
B4/480/41 16,5mm 21mm 23mm 25mm 4100mm 480mm 440mm 1850mm 7900mm 2900mm 2800mm 44800Kg 30Kw
  0.650" 0.827" 0.906" 0.984" 161" 18.898" 18.898" 73" 311" 114" 110" 98785 lbs 40HP
  1,4xTR 3xTR 5xTR  10xTR  
B4/550/21 39mm 50mm 54mm 58mm 2100mm 550mm 500mm 1950mm 6200mm 3100mm 3000mm 38500Kg 37Kw
  1.535" 1.969" 2.126" 2.284" 82" 21.654" 21.654" 77" 244" 122" 118" 84895 lbs 50HP
B4/550/26 31mm 40mm 43mm 46mm 2600mm 550mm 500mm 1950mm 6700mm 3100mm 3000mm 42800Kg 37Kw
  1.220" 1.575" 1.693" 1.811" 102" 21.654" 21.654" 77" 264" 122" 118" 94375 lbs 50HP
B4/550/31 25mm 32mm 35mm 37mm 3100mm 550mm 500mm 1950mm 7200mm 3100mm 3000mm 47800Kg 37Kw
  0.984" 1.260" 1.378" 1.457" 122" 21.654" 21.654" 77" 283" 122" 118" 105400 lbs 50HP
B4/550/41 19mm 25mm 27mm 29mm 4100mm 550mm 500mm 1950mm 7700mm 3100mm 3000mm 57200Kg 37Kw
  0.748" 0.984" 1.063" 1.142" 161" 21.654" 21.654" 77" 303" 122" 118" 126130 lbs 50HP
  1,4xTR 3xTR 5xTR  10xTR  
B4/640/21 47mm 61mm 66mm 71mm 2100mm 640mm 590mm 2150mm 6500mm 3700mm 3500mm 49800Kg 75Kw
  1.850" 2.401" 2.598" 2.795" 82" 25.197" 25.197" 85" 256" 146" 138" 109810 lbs 100HP
B4/640/26 38mm 50mm 54mm 58mm 2600mm 640mm 590mm 2150mm 7000mm 3700mm 3500mm 55800Kg 75Kw
  1.496" 1.969" 2.125" 2.283" 102" 25.197" 25.197" 85" 276" 146" 138" 123040 lbs 100HP
B4/640/31 32mm 42mm 45mm 48mm 3100mm 640mm 590mm 2150mm 7500mm 3700mm 3500mm 62200Kg 75Kw
  1.260" 1.654" 1.772" 1.890" 122" 25.197" 25.197" 85" 295" 146" 138" 137155 lbs 100HP
B4/640/41 24mm 31mm 33mm 36mm 4100mm 640mm 590mm 2150mm 8000mm 3700mm 3500mm 74400Kg 75Kw
  0.945" 1.220" 1.299" 1.417" 161" 25.197" 25.197" 85" 315" 146" 138" 164055 lbs 100HP
  1,4xTR 3xTR 5xTR  10xTR  
B4/750/21 58mm 76mm 82mm 88mm 2100mm 750mm 700mm 2650mm 7000mm 4100mm 4000mm 71000Kg 90Kw
  2.283" 2.992" 3.228" 3.465" 82" 29.528" 29.528" 104" 276" 161" 157" 156555 lbs 120HP
B4/750/26 47mm 60mm 65mm 70mm 2600mm 750mm 700mm 2650mm 7500mm 4100mm 4000mm 81200Kg 90Kw
  1.850" 2.362" 2.559" 2.756" 102" 29.528" 29.528" 104" 295" 161" 157" 179050 lbs 120HP
B4/750/31 39mm 50mm 55mm 59mm 3100mm 750mm 700mm 2650mm 8000mm 4100mm 4000mm 92000Kg 90Kw
  1.535" 1.969" 2.165" 2.323" 122" 29.528" 29.528" 104" 315" 161" 157" 202860 lbs 120HP
B4/750/41 24mm 31mm 33mm 36mm 4100mm 750mm 700mm 2650mm 9000mm 4100mm 4000mm 112000Kg 90Kw
  0.945" 1.220" 1.299" 1.417" 161" 29.528" 29.528" 104" 354" 161" 157" 246690 lbs 120HP
 
RATED AT 36,000 PSI or 250N/mm² MATERIAL YIELD STRENGTH
AND ROLLING AT FULL USEFUL LENGTH (1.4; 3 &5xTR ARE W/PRE-BENDING; 10xTR IS ROLLING ONLY)
 
  THICKNESS CAPACITY WHEN ROLLED USEFUL TOP & PINCH BENDING MACHINE    MACHINE DIMENSIONS & WEIGHT  
                 PART DIAMETER IS: ROLL ROLLS Øs  ROLLS Øs WORKING
MODEL 1,4xTR 3xTR 5xTR  10xTR LENGTH (TR) (BR) HEIGHT LENGTH WIDTH HEIGHT WEIGHT POWER
   
B4/480/21 38mm 49mm 53mm 57mm 2100mm 480mm 440mm 1850mm 5900mm 2900mm 2800mm 29000Kg 30Kw
  1.496" 1.930" 2.087" 2.244" 82" 18.898" 18.898" 73" 232" 114" 110" 63945 lbs 40HP
B4/480/26 30mm 38mm 41mm 44mm 2600mm 480mm 440mm 1850mm 6400mm 2900mm 2800mm 32500Kg 30Kw
  1.181" 1.496" 1.614" 1.732" 102" 18.898" 18.898" 73" 252" 114" 110" 71665 lbs 40HP
B4/480/31 24mm 31mm 33mm 36mm 3100mm 480mm 440mm 1850mm 6900mm 2900mm 2800mm 36500Kg 30Kw
  0.945" 1.220" 1.300" 1.417" 122" 18.898" 18.898" 73" 272" 114" 110" 80485 lbs 40HP
B4/480/41 20mm 25mm 27mm 30mm 4100mm 480mm 440mm 1850mm 7900mm 2900mm 2800mm 44800Kg 30Kw
  0.787" 0.984" 1.063" 1.181" 161" 18.898" 18.898" 73" 311" 114" 110" 98785 lbs 40HP
  1,4xTR 3xTR 5xTR  10xTR  
B4/550/21 46mm 59mm 64mm 69mm 2100mm 550mm 500mm 1950mm 6200mm 3100mm 3000mm 38500Kg 37Kw
  1.811" 2.323" 2.520" 2.717" 82" 21.654" 21.654" 77" 244" 122" 118" 84895 lbs 50HP
B4/550/26 37mm 47mm 51mm 55mm 2600mm 550mm 500mm 1950mm 6700mm 3100mm 3000mm 42800Kg 37Kw
  1.457" 1.850" 2.008" 2.165" 102" 21.654" 21.654" 77" 264" 122" 118" 94375 lbs 50HP
B4/550/31 30mm 38mm 41mm 44mm 3100mm 550mm 500mm 1950mm 7200mm 3100mm 3000mm 47800Kg 37Kw
  1.181" 1.496" 1.614" 1.732" 122" 21.654" 21.654" 77" 283" 122" 118" 105400 lbs 50HP
B4/550/41 22,5mm 30mm 32mm 34mm 4100mm 550mm 500mm 1950mm 7700mm 3100mm 3000mm 57200Kg 37Kw
  0.886" 1.181" 1.260" 1.340" 161" 21.654" 21.654" 77" 303" 122" 118" 126130 lbs 50HP
  1,4xTR 3xTR 5xTR  10xTR  
B4/640/21 56mm 72mm 78mm 84mm 2100mm 640mm 590mm 2150mm 6500mm 3700mm 3500mm 49800Kg 75Kw
  2.205" 2.835" 3.071" 3.307" 82" 25.197" 25.197" 85" 256" 146" 138" 109810 lbs 100HP
B4/640/26 45mm 59mm 64mm 69mm 2600mm 640mm 590mm 2150mm 7000mm 3700mm 3500mm 55800Kg 75Kw
  1.772" 2.323" 2.520" 2.717" 102" 25.197" 25.197" 85" 276" 146" 138" 123040 lbs 100HP
B4/640/31 38mm 50mm 53mm 57mm 3100mm 640mm 590mm 2150mm 7500mm 3700mm