BK2 Series – Metal Bellows Couplings

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Product Description

BK2 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 2 clamping hubs. 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 couplings are made of highly flexible and high-grade stainless steel. The hub material is made of aluminum or steel (please see “Specifications” section).

Clamping is done by a single ISO 4762 radial clamping screw per hub. For model 1500 and 4000, the clamping is performed by two opposite screws at 180 degrees.

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: 10 … 90mm
  • Radial Clamping Screw hub for smooth shaft
  • Easy to mount

Specifications

Coupling ModelBK2 30-69BK2 60-83BK2 80-94BK2 150-95BK2 300-111BK2 1500-166BK2 4000-225
Torque TransducersTM/TMB/TMHS 309
TS 109		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 314
TS 114		TM/TMB/TMHS 315
TS 115
RATINGS
Rated Torque30 N·m60 N·m80 N·m150 N·m300 N·m1500 N·m4000 N·m
Maximum Torque a)45 N·m90 N·m120 N·m225 N·m450 N·m2250 N·m6000 N·m
Maximum Speed b)10 000 rpm
MISALIGNMENT
Axial1 mm1.5 mm2 mm2 mm2.5 mm3.5 mm3.5 mm
Radial0.2 mm0.2 mm0.2 mm0.2 mm0.25 mm0.35 mm0.40 mm
Angular1 degree1 degree1 degree1 degree1 degree1.5 degree1.5 degree
STIFFNESS & INERTIA
Torsional Stiffness/Torsional Spring Rate39 × 103 N·m/rad76 × 103 N·m/rad129 × 103 N·m/rad175 × 103 N·m/rad450 × 103 N·m/rad1 304 × 103 N·m/rad3 400 × 103 N·m/rad
Axial spring stiffness50 N/mm72 N/mm48 N/mm82 N/mm105 N/mm320 N/mm565 N/mm
Lateral spring stiffness900 N/mm1 200 N/mm920 N/mm1 550 N/mm3 750 N/mm3 600 N/mm6 070 N/mm
Moment of Inertia0.12 × 10-3 kg·m²0.32 × 10-3 kg·m²0.8 × 10-3 kg·m²1.9 × 10-3 kg·m²7.6 × 10-3 kg·m²43 × 10-3 kg·m²165 × 10-3 kg·m²
MECHANICAL CHARACTERISTICS & ENVIRONMENT
Temperature Range-30 ... +100 °C
Diameter Range c)10 ... 30 ø[mm]H712 ... 35 ø[mm]H714 ... 42 ø[mm]H719 ... 42 ø[mm]H724 ... 60 ø[mm]H750 ... 80 ø[mm]H750 ... 90 ø[mm]H7
Hub materialAluminiumSteel
Approximate Weight0.26 kg0.48 kg0.8 kg1.85 kg4 kg11.5 kg28.8 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.
                    [post_title] => TORQUE 10 - Software
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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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