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Slipper Springs

This term describes a leaf spring style where one end of the spring has the “traditional” eye and the other end comprises the open leaf or leaves of the spring forming a “tail” which slides in a “keeper”or “hanger” which is welded to the chassis of the trailer.

This style of spring is very simple and long wearing, and is available in both black paint and hot dip galvanised finish in some sizes.

Slipper springs can be joined on a multi axle trailer with the tail of the front spring sliding over the eye of the rear spring.

Slipper Springs
Click to enlarge

SLIPPER SPRINGS 45MM X 6MM

Capacity for two springs Description Length of spring from eye to tail Free camber Eye to Centre Bolt Shackle Bolt Diameter Spring Bush Dimensions
600 kg 45mm x 6mm x 3 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
600 kg 45mm x 6mm x 3 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
900 kg 45mm x 6mm x 4 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
900 kg 45mm x 6mm x 4 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1000 kg 45mm x 6mm x 5 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1000 kg 45mm x 6mm x 5 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1200 kg 45mm x 6mm x 6 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1200 kg 45mm x 6mm x 6 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1350 kg 45mm x 6mm x 7 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1350 kg 45mm x 6mm x 7 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1380 kg 45mm x 6mm x 8 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm
1600 kg 45mm x 6mm x 9 Leaf 765mm 150mm 330mm 1/2" 1/2" X 7/8" X 45mm

SLIPPER SPRINGS 45MM X 8MM

Capacity for two springs Description Length of spring from eye to tail Free camber Eye to Centre Bolt Shackle Bolt Diameter Spring Bush Dimensions
700 kg 45mm x 8mm x 2 Leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"
850 kg 45mm x 8mm x 3 leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"
1100 kg 45mm x 8mm x 4 leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"
1350 kg 45mm x 8mm x 5 leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"
1500 kg 45mm x 8mm x 6 leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"
1700 kg 45mm x 8mm x 7 leaf 711mm 110mm 350mm 9/16" 9/16" x 7/8"

SLIPPER SPRINGS 60MM X 6MM

Capacity for two springs Description Length of spring from eye to tail Free camber Eye to Centre Bolt Shackle Bolt Diameter Spring Bush Dimensions
900 kg 60mm x 6mm x 4 leaf 765mm 150mm 330mm 5/8" 5/8" x 7/8" x 60mm
1100 kg 60mm x 6mm x 5 leaf 765mm 150mm 330mm 5/8" 5/8" x 7/8" x 60mm
1300 kg 60mm x 6mm x 6 leaf 765mm 150mm 330mm 5/8" 5/8" x 7/8" x 60mm
1400 kg 60mm x 6mm x 7 leaf 765mm 150mm 330mm 5/8" 5/8" x 7/8" x 60mm

Alternatively these springs can be attached to the trailer as individual sets.

This style of spring arrangement is a simple and low cost solution to multi axle trailer suspension.

Alternative to multi-axle trailer suspension

Single Axle Set Up Dimension "A" (No Load) Tandem Axle Set Up Dimension "B" & "C" (No Load) Nominal Axle Centres Mininum "D" Part Number for One Spring (No hangers included) Spring Surface Finish
B C
700mm - - 725mm 584563 BLACK
700mm - - 725mm 584563 G HOT DIP
700mm - - 725mm 584564 BLACK
700mm - - 725mm 584564 G HOT DIP
700mm - - 725mm 584565 BLACK
700mm - - 725mm 584565 G HOT DIP
700mm - - 725mm 584566 BLACK
700mm - - 725mm 584566 G HOT DIP
700mm - - 725mm 584567 BLACK
700mm - - 725mm 584567 G HOT DIP
700mm - - 725mm 584568 BLACK
700mm - - 725mm 584569 BLACK


Single Axle Set Up Dimension "A" (No Load) Tandem Axle Set Up Dimension "B" & "C" (No Load) Nominal Axle Centres Mininum "D" Part Number for One Spring (No hangers included) Spring Surface Finish
B C
645mm - - 860mm 584582 BLACK
645mm - - 860mm 584583 BLACK
645mm - - 860mm 584584 BLACK
645mm - - 860mm 584585 BLACK
645mm - - 860mm 584586 BLACK
645mm - - 860mm 584587 BLACK


Single Axle Set Up Dimension "A" (No Load) Tandem Axle Set Up Dimension "B" & "C" (No Load) Nominal Axle Centres Mininum "D" Part Number for One Spring (No hangers included) Spring Surface Finish
B C
700mm - - 860mm 586004 BLACK
700mm - - 860mm 586005 BLACK
700mm - - 860mm 586006 BLACK
700mm - - 860mm 586007 BLACK

 

 
Australian Design Rules (suspension requirements) & spring set selection criteria
Heavy duty and Commercial spring sets
Slipper springs
Parabolic springs
Eye to Eye (shackle) springs
Rocker Roller springs
Spring hanger kits
U Bolt kits and U Bolts
Spring Fittings
Spring bushes / fish plates
Spring hangers / shackle plates
Shackel pins / spring axle pads
Spring hangers / rockers
Helpful Hint!
Spring description such as 45mm x 6mm refers to the leaf width and thickness.
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