Yokota - Intelligent Assembly Solutions

Controllers & Accessories for the TKA Series


Accessories including Valves & Toolcable for Yokota System Wrenches (scroll down).


Torque control & angle monitoring

  • Torque control
  • Angle monitoring version
  • One channel controller
  • LAN version optional

Torque control & angle monitoring (including snug torque)

  • Torque control
  • Angle monitoring version
  • Two channel controller
  • Two tools can be operated simultaneously
  • LAN standard, two IP addresses
Use me for…


Control Unit for the TKA Series
  • Easy to program, according to application specifications
  • Easy to program with PC
  • Torque calculation over several impulsions
  • Compensation impulses to compensate the relaxation (soft joint)
  • Poka Yoke proof, line management
  • 2-step tightening optional
  • 8 setting programs
  • Parallel and RS-232 connectors standard 2-way communication through RS-232
  • Automatic program change (sequence programmable)
  • Real time clock
  • Build-in timer for group control
  • Several input signals
  • Several output signals
  • Statistics inside CP / CPK
  • Memory for 10.000 cycles
  • Transducer integrated, direct measurement
  • Angle encoder integrated
  • Compact angle encoder
  • Torque transducer non - contact type
  • Torque and angle curve on PC
  • Easy torque adjustment on the tool
  • LED or acoustic signal on the tool
  • High efficiency air motor
  • Shut-off by external solenoid valve

Sizing Options

High accuracy
Product liability is essential to car manufacture. All tightened joints have to be correct. For this reason critical joints must
be counted, documented and, of course, tightened with the right clamping force. In order to do this, you need an impulse
wrench (with a built-in transducer) connected to a controller. This system ensures that only OK joints are counted resulting in
“Zero Fault Production”. This fail-safe system fits perfectly in the Poka Yoke Strategy.

Transducer for the TKa series
The strain gauges are positioned on the main shaft, picking up the twisting torque on the main shaft at each impulse as close as possible to the socket. The electric signals are transmitted by induction through the internal and external coils. Due to this principle the YOKOTA transducer is very reliable, accurate and without wear. The angle sensor is also mounted on the main shaft.

Possible Error Detections

  • Detection insufficient torque and over torque
  • Detection friction out of tolerances
  • Detection of too long / too short bolt
  • Detection of seizure
  • Detection of cross threaded threads
  • Detection of crooked threads
  • Detection of damaged threads
  • Detection of double tightening
  • Detection of blind holes