90mm Stroker Crankshaft for Ford Barra XR6 Turbo 4.0 L Cranks
Quick Detail
Dimension
NLGROUP DESIGN
customized design counterweight Pendulum Undercut Counterweight
Knife Edge Counterweights Oil Groove Counterweights
Knife Edge Counterweights Tapered Counterweights
Lighten Holes at Rod Journals
Technical Features
• Materials:40CrNiMoA Heating treatment:HRC34-38
• Crankshaft will get thermal refining after normalizing,HRC34-38.The difference will be within 4HRC on same one cranks
• No over burning,carbon-free surface layer is within 0.3mm
• Folding,oilet,cracks, oxidation and other things is not permitted for Cranks macrostructure.
• Balance weight value need keep 0-20g.cm on counterweight of big end and small end
• Peening treatment will be done after balance weight
• Nitrogen treatment will be done after precision grind,compound layer depth is 0.008mm after polishing.diffusion layer is over 0.3mm,hardness on surface is not less than 500HV.
• No damage,scallops and other visible disadvantage on surface.
• Crankshaft will be cleaned up to make sure there is no filings in oil hole.
• magnetic flaw detecting will be done according to standard JB/76729-93
• Other size tolerance :standdars GB1804-79 IT14,No marked place roughness:Ra6.3
Processing & Packaging
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