General

ModulT - General

The Haldex ModulT program is a new air disc brake platform developed specifically for the purpose of meeting increased customer demands on performance, robustness, service up-time, weight and total cost.

Advantages:

  • Low weight whilst retaining stiffness and durability
  • A single tappet mechanism with similar clamping force distribution as the Haldex twin tappet mechanism
  • Simplified maintenance safe boltless pad retainer and only two bolts for the complete brake
  • Modular the same mechanism and sliding function design used on multiple brake sizes
  • Long service life stainless sliding pins, PTFE coated steel bushings, and the mechanism bellows is folded inwards thus protected from external affection
  • High efficiency the use of double roller bearings for the mechanism lever keeps the hysteresis low and thus a high efficiency is achieved

The ModulT program consists of a number of variants for various wheel sizes and various applications within the truck, bus and trailer segments.
The basic design of the ModulT consists of a large single tappet mechanism, a monobloc calliper and two sliding pins.
The Haldex ModulT disc brake is designed to provide high performance coupled with durability, low weight and a minimum number of wearing parts. The ModulT enhances a floating monobloc calliper and an integrated adjustment unit, which automatically compensates for brake pad wear. The disc brake is actuated by the brake chamber onto the mechanism lever, which presses the inner brake pad against the disc. This then causes the calliper to slide laterally, so that the outer brake pad also comes in contact with the disc. The calliper moves on two stainless, lubrication free, slide pins. The brake can be used for various applications subject to installation approval.

DBT 19 LT, a new member of the ModulT family for 19" applications

Carry over design, leading to....

  • Same adjuster function as ModulT 22.5"
  • Same sliding function as ModulT 22.5"
  • Same type of pad locking system as ModulT 22.5"
  • Same effectiv serviceability as ModulT 22.5"

3D Video Animation

Characteristic data of ModulT disc brakes

General DBT 19 LT DBT 22 LT
Design rated max brake torque
18 kNm 20 kNm
For wheel size 19" / 22.5" 22.5"
Max. operation force 11 kN 11 kN
Friction radius 149 mm 173 mm
Max. brake cylinder stroke 62 mm 65 mm
Nominal brake ratio 15.4 : 1 15.4 : 1
Mechanical efficiency > 93 % > 93 %
Running clearance (min-max) 0.7 - 1.1 0.7 - 1.1
Weight of complete disc brake unit, including pads 29 kg 32 kg
Disc    
External diameter of brake disc 377 mm 430 mm
Total thickness when new 45 mm 45 mm
Residual thickness worn out 37 mm 37 mm
Pad    
Total thickness 30 mm 30 mm
Backplate thickness 8 mm 7.5 mm
Pad surface area (both pads) 294 cm² 318 cm²
Pad wear volume (both pads) 603 cm³ 636 cm³
Options    
Pad wear indicator (PWI)    
Carrier hole pattern