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Tech and FAQ

Axle Tech 101
What axle material do you use? What makes your axles stronger than stock? Why induction hardening versus thru hardening? Why are your axles machined after heat treating? These are just a few of the questions we address every day at Dutchman.


Most stock (OEM) axles are made from 1039 material and are induction (case) hardened, have a .150 case depth, and a hardness of 52-54 Rockwell "C" scale. We use (1) piece forgings made from 1541-H material, a case depth of .300-.350, and a hardness of 57-60 Rc. The result of these upgrades yields a "Stronger than Stock" street and strip alloy axle. The hard case and soft core design enable the shaft to bend, flex and spring back. Properly executed, both chrome-moly "thru hardened" and an upgraded "induction hardened" shaft can achieve the same results in strength in the critical areas of torsional strength and life cycles. The design of an induction hardened shaft usually yields more bending (life) cycles than a thru hardened shaft.

Manufacturing Methods

Most shafts warp and bow during heat treating. For this reason we machine all the critical areas (splines, bearing journal, flange face, and brake pilot) AFTER heat treat. The splines are machined to the correct pressure angle for the particular application, typically 30 or 45 degrees. Most manufacturing engineers will concur with this method of production. All axles are custom made to order with your choice of length, spline, and most popular bolt patterns. Features include a non tapered body and a ductile flange which allows for shortening and/or an additional bolt pattern now or later if needed.

Race Acceptance

Our Big Bearing (30 spline and larger) axles are NHRA & IHRA accepted . Dutchman alloy axles currently meet SFI aftermarket axle specifications.

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