45mm Square Mechanical Galvanised Disc Brake

SKU: 45SGM Category: Tags: ,

$714.95 - $1,434.00

Couplemate accepts PayPal, Visa and Mastercard.

45mm Square Mechanical Disc Brake Axle

45mm square mechanical disc brake is galvanised and activated when the tow vehicle uses the override brake.

Necessary: Axle pads locate and centre the axle of the trailer springs. Please advise the outside chassis width of your trailer. We are then able to weld axle pads into the correct position. This service is not included in the price as some customers do not require this service.

Disc Brake Wheel Options

  • Holden HT.
  • Holden HQ.
  • Ford.
  • 6 Stud Landcruiser.
  • 5 Stud Landcruiser.
  • 6 Stud Parallel Landcruiser.

Bearing Sizes

  • Slimline Bearing Configuration LM12749/LM68149
  • Parallel Bearing Configuration LM68149/LM68149

Couplemate manufacturers and tests all square mechanical disc brake override axles.

Kit includes

Mechanical Override Disc Brakes are simple brakes to understand and maintain. Ensure brake caliper adjustments are made on the caliper bolt, not the cable adjuster.

Couplemate installs the best Al-ko calipers on all of our mechanical braking systems.

The force exerted during braking from the tow vehicle engages the override brake, activates the mechanical calipers causing braking.

Please note: We ask you for your face-to-face measurement of your axle.

The latest news on small axles causing trailer and caravan axle fatigue.

Calculating The Correct Axle Measurements

  1. Measure the offset wheel. The wheel offset is the distance the hub’s insidhub’s inside and the rubber’s outsidem to the offset. Alternatively, choose your distance between the rubber and the chassis.
  2. Multiply by 2 for both sides. Add your chassis width to the above number.
Still unsure of what measurements to take? Check out this handy guide below:

[P] – Check material specifications. What size and profile is the axle (for example, 45mm Square)
[T] – Overall axle length (tip to tip)
[F] – Hub face-to-hub face measurement
[A] – Chassis width
[C] – Tyre clearance
[B] – Back offset
[H] – Tyre to chassis
[G] – Axle pad centres

How To Measure An Axle

Identifying Bearing Combinations

You will also need to identify your bearing combination which can be done by pulling off a hub and bearings and locating the number laser engraved onto the bearing. You will require both the inner and the outer bearing numbers.

Where to identify bearing number. Look for the laser engraved number on the bearing.



Did you know that the bolts holding in your caliper can unwind on rough, corrugated roads?

Couplemate uses a medium-strength locktite on all mechanical caliper bolts.


    Be the first to review “45mm Square Mechanical Galvanised Disc Brake”

    Your email address will not be published. Required fields are marked *