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Material Used and Tensile Strength of TruRyde Spindle # TRU84FR

Question:

What type of steel is this made of? Or can you give an approximation of the yield strength?

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Expert Reply:

According to TruRyde, the bar stock material used on spindles like # TRU84FR is SAE 1045 hot rolled. This allows the spindle to harden to an extent, but it is a medium tensile steel with a tensile strength of 570-700 MPa and Brinell hardness ranging between 170 and 210.

The spindle is designed to retain a slight amount of flex to retain its durability when a trailer goes over a bump or through a hole in the road.

TruRyde Spindle # TRU84FR is rated for use on 3,500 lb axles.

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Jameson C

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