BK3 Series – Metal Bellows Couplings

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Product Description

BK3 Series Metal Bellows Couplings provide the ideal complement to Magtrol’s s TM / TMB / TMHS / TS In-Line Torque Transducers and Sensors, when these are to be mounted in a drive train.

The torque transmission element consists of a metal bellows and a conical clamp connection. The couplings are both torsionally stiff and flexible in order to compensate for axial, angular and radial misalignment when connecting two shaft ends. The high torsional spring rate of the couplings ensures a high torsional stiffness and angular precision.

Design & Material

Bellows made of highly flexible high-grade stainless steel, the hub material is made of steel.

The clamping hubs each consist of 2 conical parts, one of which, in contact with the shaft, is slotted. The clamping is done by means of 6 screws ISO 4017 per side.

Features

  • Metal Bellows Couplings for use with Magtrol TM, TMB, TMHS and TS Series In-Line Torque
    Transducers and Sensors
  • Dedicated for transmission of Torque
  • High Torsional Stiffness
  • Diameter Range: 12 … 100mm
  • Clamping to a smooth shaft by tapered conical sleeves
  • Easy to mount

Specifications

MODEL BK3 60-66 BK3 150-75 BK3 200-78 BK3 500-97 BK3 800-114 BK3 1500-141 BK3 4000-195
Torque Transducers TM/TMB/TMHS 309
TS 109		 TM/TMB/TMHS 310
TS 110		 TM/TMB/TMHS 311
TS 111		 TM/TMB/TMHS 312
TS 112		 TM/TMB/TMHS 313
TS 113		 TM/TMB/TMHS 314 TM/TMB/TMHS 315
RATINGS
Rated Torque 60 N·m 150 N·m 200 N·m 500 N·m 800 N·m 1 500 N·m 4 000 N·m
Maximum Torque a) 90 N·m 225 N·m 300 N·m 750 N·m 1 200 N·m 2 250 N·m 6 000 N·m
Maximum Speed b) 10 000 rpm
MISALIGNMENT
Axial 1.5 mm 2 mm 2 mm 2.5 mm 3.5 mm 3.5 mm 3.5 mm
Radial 0.20 mm 0.20 mm 0.25 mm 0.30 mm 0.35 mm 0.35 mm 0.40 mm
Angular 1 degree 1 degree 1 degree 1 degree 1.5 degree 1.5 degree 1.5 degree
STIFFNESS & INERTIA
Torsional Stifness / Torsional Spring Rate 76 × 103 N·m/rad 175 × 103 N·m/rad 191 × 103 N·m/rad 510 × 103 N·m/rad 780 × 103 N·m/rad 1304 × 103 N·m/rad 3400 × 103 N·m/rad
Axial spring stiffness 72 N/mm 82 N/mm 90 N/mm 70 N/mm 100 N/mm 320 N/mm 565 N/mm
Lateral spring stiffness 1 200 N/mm 1 500 N/mm 2 040 N/mm 2 500 N/mm 2 000 N/mm 3 600 N/mm 6 070 N/mm
Moment of Inertia 0.39 × 10-3 kg·m² 1.2 × 10-3 kg·m² 1.7 × 10-3 kg·m² 9.1 × 10-3 kg·m² 13.2 × 10-3 kg·m² 34.9 × 10-3 kg·m² 85.5 × 10-3 kg·m²
MECHANICAL CHARACTERISTICS & ENVIRONMENT
Temperature Range -30 ... +100 °C
Diameter Range c) 12 ... 29 ø[mm]H7 15 ... 38 ø[mm]H7 15 ... 44 ø[mm]H7 24 ... 60 ø[mm]H7 30 ... 60 ø[mm]H7 35 ... 70 ø[mm]H7 50 ... 100 ø[mm]H7
Balancing Quality 2.5 Q
Hub Material Bellows made of highly flexible high-grade stainless steel; hub material is steel
Approximate Weight 0.8 kg 1.2 kg 1.8 kg 4.2 kg 5.6 kg 8.2 kg 23 kg

a) Brief overloads, acceptable up to 1.5 times the rated torque
b) Higher speed available on request
c) The standard versions are manufactured with integer values; the standard tolerance is H7. All diameters and tolerances are possible, within the defined max. range. Please contact our sales department.

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                    [post_content] => Magtrol’s Model 3411 Torque Display is designed for use with all Magtrol TS, TM, TMHS, TMB and TF Torque Transducers. This easy-to-use device powers the transducer and utilizes high speed processing to display torque, speed and mechanical power. It includes a tare function to help offset any slight residuals caused by couplings or suspended loads. The 3411 may also be used with any torque sensors requiring 24 V DC power (500 mA max.) with ± 5 V DC torque output (± 10 V DC max.) and open collector, TTL or CMOS output for the speed signal.
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                    [post_content] => Magtrol’s TORQUE 10 Software is an easy to use Windows® executable program, used to automatically collect torque, speed, mechanical power and angle data from Magtrol TS Series Torque Sensors or Magtrol TM Series Torque Sensors by using Model 3411 Torque Display. The data can be printed, displayed graphically or quickly saved/exported as a Microsoft® Excel spreadsheet.

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Ordering Information

TORQUE 10 is now included with the purchase of a TS Series Torque Sensor or Model 3411 Torque Display.
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                    [post_content] => Magtrol’s In-Line Torque Transducers provide extremely accurate torque and speed measurement over a very broad range. Each model has an integrated conditioning electronic module providing a ±5 VDC (±10 VDC) torque output and an open collector speed output. Magtrol Torque Transducers are very reliable, providing high overload protection, excellent long term stability and high noise immunity.

All transducer models employ our unique non-contact differential transformer torque measuring technology. This measuring technology offers many benefits, most notably that no electronic components rotate during operation.

To provide customers with several price/performance options, Magtrol offers three torque transducer models: basic model (TMB Series), high accuracy (TM Series) and high speed with high accuracy (TMHS Series).

Each transducer consists of a hardened stainless steel shaft with smooth, splined or keyway shaft ends, an anodized aluminium housing containing the guide bearings and an electronic measurement conditioner.

The integrated electronic circuit, supplied by single DC voltage, provides torque and speed signals without any additional amplifier. The transducer is a stand-alone measuring chain. Connections are made by means of a 6-pole male connector mounted on the housing. A removable aluminium base (delivered as standard with TM Series and TMHS Series models, and as an option for TMB Series transducers) allows fixed mounting of the transducer.

Features


    
 	
  • Integrated Torque and Speed Conditioning
    • 
 	
  • Torque Range: 0.1 N·m ... 10 kN·m (0.07 lb·ft ... 7375 lb·ft)
    • 
 	
  • Accuracy: < 0.1%
    • 
 	
  • Overload Capacity: 200%
    • 
 	
  • Breaking limit: up to 400%
    • 
 	
  • High Speed Applications: up to 50 000 rpm
    • 
 	
  • Non-Contact (no slip rings)
    • 
 	
  • No Electronic Components in Rotation
    • 
 	
  • No Electrical Noise
    • 
 	
  • Single DC Power Supply: 20 ... 32 VDC
    • 
 	
  • Immediate Speed Detection
    • 
 	
  • Adjustable Torque Signal Frequency Pass Band up to 5 kHz
    • 
 	
  • Built-in Test Function
    • 
 	
  • Stainless Steel Shaft
    • 
 	
  • EMC Susceptibility Conforms to European Standards
    • 


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