40mm Square Axle w/ 9″ Mechanical Drum

40mm Square Mechanical Drum Brake Axle assembly

40mm Square Mechanical Drum braked axle assembly to suit 9" drums. Suits 2000kg override couplings — single Axle rating 1000kg.

The rating of this axle is 1000kg as this axle uses standard Holden bearings. Axle rating is controlled by bearing sizes.

• 11949 - Outer Bearing.
• 67048 - Inner Bearing.

9" mechanically braked axles are very simple to install. Attached are the mechanical backing plates to a weld ring, welded to the rear of the axle shoulder.

Mechanical weld rings are identical to electric weld rings. The hardest part of the entire job is to align the weld rings perfectly.

We recommend customers dry-fit the backing plates and weld ring, without grease. Once the drum is in position and locked with the axle nut, tighten the brake shoes.

Align the backing perfectly with the drum and then spot weld the ring in 4 places. Re-adjust where necessary and then finish the welding on the ring.

The disc braked axle is another popular mechanical braked axle.

Calculating The Correct Axle Measurements

1. Measure the offset wheel. The wheel offset is the distance between the inside of the hub and the outside of the rubber.
2. Add 50 mm to the offset. Alternatively, choose your own distance between the rubber and the chassis.
3. Multiply by 2 for both sides. Add your chassis width to the above number.

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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

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.