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Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
CNC machining with tolerance within ±0.005mm
Dynamic balancing to G6.3 grade or better
Micro-inch surface finish (Ra ≤ 0.4μm) on journal surfaces
100% dimensional inspection before shipment
Forged from premium alloy steel (42CrMo4, SAE 4340, EN19)
Optional ductile iron casting for specific applications
Grain flow optimization for maximum strength
Ultrasonic testing for internal defect detection
Induction hardening on journal surfaces (HRC 55-60)
Deep case hardening depth 2.5-4.0mm
Tempering for optimal toughness-stress balance
Cryogenic treatment available for racing applications
Full traceability from raw material to finished product
Material certification (MTC) with chemical composition
Hardness testing on each production batch
Magnetic particle inspection for surface defects
| Features:Customized forgings Crankshaft |
| 1) Materials: carbon steel, Alloy steel, stainless steel etc. |
| 2) Standard: JIS, DIN, ASTM, BS |
| 3 ) Surface treatment: Zinc Plating, Hot dipped galvanizing, Powder coating, Painting ,Shoot blasting etc. |
| 4) Weight: 0.5 -10kg |
| 5) Processes : Forging, CNC Machining. |
| 6) Manufacturing equipments: three die-forging product lines (3 ton stamp forging hammer product line, 1000 ton friction product line, 1250 ton press product line), various loose hammers and cylinder parts , automatic control ring forging machine, heat treatment cellar, digital control fibre natural gas car furnace, standing machine tool, machine tools, standing miller, standing drill machine, bench drill machine ,CNC machining centre etc |
| 7) Testing equipment: Supersonic inspection machine, Supersonic flaw detecting machine , physics and chemical analysis. |
| 8)Services |
| a) Also can design and manufacture forged according to the customers' requirement |
| b) ISO9001 quality control and inspection |
| c) In house & Third Parties |
| d) Ordering and warehousing |
| 9)Packing: Wooden cases or according to customers' needs |
Reverse engineering from samples
Design optimization consultation
Custom material selection
Prototype development
Direct replacement for popular models
Performance upgrades (stroke modification)
Nitriding treatment for racing
Regrinding service for undersize bearings
Individual poly bags + vacuum sealing
Custom foam inserts in export cartons
Wooden crates for heavy-duty protection
Barcode labeling for inventory management
FOB, CIF, DAP shipping terms
Experience with automotive supply chain
Just-in-time delivery capability
Container loading optimization
*We have specialized QC testers to check the quality of the products according to different customers' requirement. Usually, it's random inspection, and we also offer 100% inspection at a reasonable price if required.
*We have IQC to check the dimensions and surface of the incoming material
*We have PQC to inspect full-course during the manufacturing processing
*We have FQC to inspect all the anodizing/plating and other finishes' products from our supplier and proceed with the professional quality and appearance inspection before shipping.
The crankshaft is widely used in various mechanical equipment such as engineering machinery, agricultural machinery, airplanes, trains, etc.
We could also develop new products according to customer's specific requirements.
Shipping way:
1) 0-100kg: express&air freight priority,
2) >100kg: sea freight priority,
3) As per customized specifications
Packing & Delivery:
1.Packing Detail: Each product packed with plastic preservative, EPE, foam plastic bag, Carton outside, wood case or iron case or as per the customer's special requirement. Besides, the custom package takes a week to prepare in advance.
2.Delivery Detail: the fast International Shipping time takes 3 ~5 working days by DHL/UPS/FedEx, slow shipping time takes 7~ 8 working days by DHL/UPS/FedEx/TNT, etc
Q1: What materials do you typically use for your crankshafts?
A: We primarily use high-quality alloy steels like 42CrMo4 (DIN), SAE 4340 (AISI), and EN19. For specific high-volume or cost-sensitive applications, we also produce high-strength ductile iron (e.g., GGG-70) crankshafts. Material choice depends on the engine's performance requirements, and we provide full material certification.
Q2: What is the difference between forged and cast crankshafts from your factory?
A: Forged Crankshafts: Made from solid alloy steel billets under extreme pressure. They have superior grain flow, higher strength, and better fatigue resistance, making them ideal for high-performance, turbocharged, or heavy-duty applications.
Cast Crankshafts: Made from melted ductile iron poured into molds. They offer an excellent strength-to-weight ratio and cost-effectiveness for high-volume passenger car engines. Both processes in our factory utilize advanced technology and strict quality control.
Q3: What heat treatment processes do you apply?
A: Our standard process includes induction hardening on all journal surfaces (main and pin) to achieve a hard, wear-resistant surface (HRC 55-60) with a tough core. This is followed by tempering to relieve stresses. We also offer nitriding and case hardening for special applications requiring extreme wear resistance or fatigue strength.
Q4: What balancing standards do you meet?
A: Our standard balancing grade is G6.3 per ISO 1940-1, which is suitable for most automotive applications. For high-performance and racing engines, we offer G2.5 or better balancing upon request. Each crankshaft is individually balanced on computerized machines, and a balancing report can be provided.
Q5: Can you manufacture crankshafts based on our samples or drawings?
A: Yes, absolutely. We specialize in OEM manufacturing and reverse engineering. You can send us a sample, OEM part number, or detailed CAD drawings. Our engineering team will analyze it and provide a manufacturing proposal, including material recommendation and process flow.
Q6: What is your minimum order quantity (MOQ)?
A: For standard aftermarket replacement parts, our MOQ can be as low as 50-100 pieces. For custom/OEM projects, the MOQ is negotiable based on design complexity and tooling investment. We are flexible to support both large-volume and trial orders.
Q7: What is your lead time?
A: For existing molds/designs, lead time is 30-45 days after order confirmation and deposit. For new designs requiring tooling, lead time is 60-90 days for sample approval, plus production time. We maintain safety stock for some popular models.
Q8: How do you pack crankshafts for export?
A: Each crankshaft is individually wrapped in anti-rust paper or plastic, then placed in a custom-sized cardboard box with foam end caps for protection. Boxes are then packed securely in strong export cartons or wooden crates for container loading. We optimize packaging to prevent damage during transit.
Q9: What are your payment terms?
A: Standard terms are 30% T/T deposit with order confirmation, and 70% balance against copy of Bill of Lading. For long-term partners or large orders, we can discuss more flexible terms. L/C at sight is also acceptable.
Q10: Can you supply a full engine component kit?
A: While we specialize in crankshafts, we have reliable partner factories and can help source or assemble a full rotating assembly kit, including connecting rods, pistons, bearings, and timing components. Please inquire about your specific kit requirements.
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