Model 3900-SR NVH Squeal Rig Dynamometer




Test Equipment, Laboratory Testing

Test Type

Durability, Noise, Vibration, & Harshness

Model 3900-SR NVH Squeal Rig Dynamometer


The Model 3900-SR NVH Squeal Rig Dynamometer is a full-sized test machine designed for brake noise testing on automotive and light truck applications in an acoustically controlled temperature and humidity environment. It incorporates a specially designed AC motor that delivers precise high-torque drag capability required for NVH brake testing. A unique feature of the Squeal Rig is its single fixed inertia disc, which is supplemented by electric inertia simulation, so a technician does not have to change mechanical inertia discs. The Model 3900-SR NVH Squeal Rig, pinpoints the source of brake noise, helping brake engineers eliminate it.


Control Software ProLINK
Sample Rate 2000 samples/sec
Drive Motor 186 kW (AC)
Shaft Speed 0 - 1500 rpm
Brake Torque 5650 Nm
Mechanical Inertia 27.5 kgm²
Inertia Range with I-Sim 5 - 250 kgm²
Brake Apply Pressure 200 bar
Brake Apply Rate 700 bar/sec

-40 to +60°C

Humidity 15 to 95% RH


Key Benefits

  • ProLINK software
  • Proven components with low maintenance
  • Controls and power cabinet integrated onto machine
  • Suspension and knuckle test fixtures isolated from machine vibrations
  • Large environmentally controlled test enclosure
  • Safety interlocks on all guard doors
  • Operator controls on pedestal workstation
  • Video monitoring camera

Test Procedures

  • ECE R13 and R90 type approval for categories N, M, and O
  • ISO 11157-ECE R13 performance
  • ISO 26867 friction behavior assessment
  • JASO C406 passenger car brake performance
  • JASO C419 and C459 caliper performance and durability
  • JASO C427 wear vs. temperature
  • JASO C443 mountain descent simulation
  • LACT noise and wear simulation
  • Laurel Mountain durability
  • Parking brake drive-away
  • Parking brake performance
  • Rotor thermal deflection
  • Rotor thermal fatigue
  • SAE J2784 for FMVSS 105 & 135 dyno testing below 4 450 kg GVWR
  • SAE J2928 rotor crack for aftermarket
  • SAE J2521 noise squeal matrix
  • SAE J2522 AK-Master
  • SAE J2707 wear vs. temperature and block wear
  • Structural integrity
  • Dynamometer testing under ISO 15484

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