9/16″ x 75mm Center Shackle Plate

9/16″ x 75mm Center Shackle Plate

9/16″ x 75mm centre shackle plate connects the caravan or trailer spring to a dumjack welded onto your chassis rail. Plates can vary in width from 32mm to 40mm.

Available Shackle Plate Sizes

• 1/2″ Holes – 63mm Centers – 8mm Thick – 40mm Wide
• 1/2″ Holes – 75mm Centers – 8mm Thick – 40mm Wide
• 1/2″ Holes – 55mm – 82mm Slotted – 8mm Thick – 40mm Wide
• 1/2″ Holes – 82mm – 115mm Slotted – 8mm Thick – 40mm Wide
• 9/16″ Holes – 63mm Centers = 8mm Thick – 40mm Wide
• 9/16″ Holes – 75mm Centers = 8mm Thick – 40mm Wide
• 5/8″ Holes – 63mm Centers = 8mm Thick – 32mm Wide
• 5/8″ Holes – 63mm Centers = 8mm Thick – 40mm Wide
• 5/8″ Holes – 75mm Centers = 8mm Thick – 40mm Wide

This humble plate handles loads up to 3200kg when used on a tandem trailer.

Question: Why do my trailer shackle plates bend towards the back of the trailer?

Answer: Spring hangers installed incorrectly cause the plates to overstretch into a horizontal position. Ideally, when looking at the left-hand spring, locate the shackle plates at 5 o’clock.

Question: What is ElectroGal?

Answer: Electrogal is a premium coating. Raw metal parts are dipped in an acidic coating and then electro-coated in nickel to provide an undercoat. The final process is patented secret; however, testing has concurred that ElectroGal is superior to a galvanised finish.

Where do my hangers go?

Ideally, weld the dumjack into position 25mm longer than your spring. This distance allows the correct operation of your caravan or trailer spring.

25mm is the minimum distance for 45mm wide springs.

35mm is the minimum distance for 60mm wide springs.

Spring hangers welded into position in the same eye-to-eye measurement as the spring will immediately cause problems. This practice is more common than most owners realise.

The remedy is simple: measure your spring length from the middle to the centre of the eye. Add a minimum of 25mm, which should be your spring hanger centres.

Installing longer shackle plates does not fix any problems.

Are you Confused? It gets worse. Shackle, please come in various centres from 63mm to 75mm. There are also different hole sizes from 1/2 inch to 5/8 inch.

Why all the variations?

Use a 75mm centre shackle plate with 9/16 inch holes for 45mm springs and 5/8 inch holes for 60mm springs. You only need 75mm centres on your shackle plate.

I would stick to 63mm centres for 60mm springs and 75mm for 45mm springs.

Read about your correct hanger spacings.

Finally, call our sales team and ask them your question.

Shackle Plates – Caravan – Trailer