Arrow Precision have now completed their purchase and relocation of DKE Crankshafts. Over a period of three months we have moved the DKE machine shop into new premises, invested in new machinery and reorganized the workflow to maximize efficiency and accuracy.
An excellent and experienced workforce have joined us, including Simon Osman, a former director at DKE, as well as a core of highly skilled engineers. Simon will be overseeing production of Arrow crankshafts here in the heart of the UK and will head the team responsible for technical innovation and product development.
DKE led the field in the manufacture of high performance crankshafts for nearly twenty years, supplying many of the world’s top motor manufacturers, tuners and engine builders, a mantle Arrow are more than happy to assume, our chief aim being to progress our relationships with these companies and individuals and also to develop relationships with new customers who can benefit from the crossover between cranks and Arrows existing connecting rod and race component business.
Recent successes include: The street-legal saloon world speed record with the Brabus E V12. The Nürburgring lap record with the Radical SR3 Turbo. First place in the LM2 Class and second place in LM1, with the Judd-powered cars in this year’s Le Mans 24 Hours. They all relied on our crankshafts to help them achieve their outstanding performance.
Arrow Precision will continue the traditions of craftsmanship and technical excellence inherited from DKE but will also bring consistency and efficiency through new working practices and technological advances in design and manufacture. We aim to manufacture the best that technology can give us, but always with the hindsight of experience.
From custom to production, from vintage to LeMans, you need Arrow at the heart of your engine.

material
Arrow spec Corus 722M24.
Cleanliness is a major advantage, oxides are reduced by best steel making practice and controlling sulphur reduces sulphides. The resulting increased cleanliness / reduced impurities give a major improvement in transverse properties e.g. strength and ductility making the crank less likely to fracture. Improving the mechanical properties raises the resistance to shock and offers a better diffusion of nitriding resulting in increased endurance.

oil feed
The supply to the big end is optimized to maintain maximum oil film thickness and strength.
Low pressure from the main journals gives more efficient supply at higher RPM, it also enables the crankshaft to run at lower oil pressure reliably.

attention to detail
The fillet radii is critical. Radii must be full and of correct form in both rough and finished state, to ensure the nitrided layer is of uniform thickness around entire surface.

crack detection
100% inspection.

balanced
Between 2 and 15 grams (depending on number of cylinders).

inspection
100% critical detail check.

Arrow Precision crankshafts include:

• Full custom service with reverse engineering facility
• FEA analysis (if required)
• Our own grade of low sulphur CORUS steel in EN40B (722M24)
• Fully machined
• Balanced between 2 and 15 grams (depending on the number of cylinders)
• 100% crack detection 
• Certification – material, heat treatments, balancing, critical detail inspection
report, (Roundness trace as required and topography trace as required)
• Stock for popular engines off the shelf

If you seek the finest competition crankshaft for your project look no further than Arrow Precision.