Forged Steering Knuckles for Passenger Car, CV & Tractor Applications
Shivam Forge manufactures precision hot-forged steering knuckles — passenger car knuckles, commercial vehicle front axle knuckles, tractor front axle knuckles, McPherson strut knuckles and stub axle knuckles — at our Shapar GIDC facility in Rajkot, Gujarat. We produce knuckle forgings in EN19/SAE 4140 and EN24/SAE 4340, with CNC machining of bearing seat, ball joint seat and tie rod arm in-house.
The steering knuckle is one of the most complex load-carrying forgings in any vehicle — it carries cornering loads, braking forces, steering inputs and bump loads through a multi-armed geometry with multiple machined interfaces. Fatigue failures in knuckles are catastrophic, making material selection, forging grain flow and post-forge heat treatment critical decisions. Shivam Forge has engineered and manufactured steering knuckle forgings for Indian automotive OEMs and export customers for over 20 years, with full CMM-verified dimensional control and fatigue test documentation.
Forged passenger car steering knuckles in EN19 (SAE 4140), quenched and tempered to 248–302 HB. Bearing seat, ball joint seat and tie rod arm boss machined by CNC to drawing. McPherson strut tower boss and ABS sensor mount integrated into the forging geometry.
Knuckles for McPherson strut front suspension in modern passenger cars and crossovers. The strut clamp collar and pinch bolt lug are forged integral with the knuckle body, eliminating the stress concentration of a welded or pressed collar. EN19 grade, CNC finish machined.
Heavy-duty steering knuckles for truck, bus and HCV front axles in EN24 (SAE 4340), quenched and tempered to 269–311 HB. King pin bore, track rod arm boss, brake flange pilot and hub bearing face are CNC machined. Supplied per customer drawing.
Forged tractor front axle knuckles and stub axle assemblies in EN19 or EN24 for two-wheel drive and four-wheel drive tractor applications. King pin bore and stub axle journal are machined in-house. Suitable for 30–120 HP tractor front axle specifications.
Knuckles with forged ball joint seat receivers for double wishbone and multilink suspension systems. Ball joint seat bore is finish machined to H7 tolerance with Ra 1.6 μm surface finish. Tie rod arm taper and castle nut thread are machined to drawing.
Integrated knuckle-spindle forgings where the hub spindle and knuckle body are forged as a single piece — eliminating the knuckle-to-spindle joint that is a fatigue initiation point in two-piece assemblies. Used in light commercial vehicle and 4×4 front axles.
Steering knuckles are complex multi-arm forgings requiring precision die design to ensure die fill at the king pin boss, ball joint seat and brake flange extensions without excessive flash. Our forging engineers use FEA-based die design to optimise material flow and minimise forging defects.
EN19 knuckles are Q&T to 248–302 HB; EN24 knuckles are Q&T to 269–311 HB. Heat treatment is performed in sealed atmosphere furnaces to prevent surface decarburisation. Temperature uniformity within ±10°C across the furnace load is verified per run.
All bearing seats, ball joint bores, king pin bores and hub face surfaces are CNC machined to drawing tolerances. Bearing seats are machined to k6/p6 fit with Ra 0.8 μm. Ball joint tapers are machined to 1:10 taper with gauged inspection.
Finished knuckle forgings are inspected on a 3-axis CMM to verify all critical dimensions: bearing seat diameter and runout, ball joint seat position, king pin bore diameter and perpendicularity, and overall arm geometry. First article inspection report generated for all new part numbers.
All knuckle forgings are magnetic particle tested after heat treatment to detect surface and near-surface cracks at forging fold-risk zones: crotch areas between arms, fillet radii and boss transitions. Any crack indication is cause for rejection.
EN19/SAE 4140 is the correct grade for passenger car knuckles where the design load is moderate and weight matters. EN24/SAE 4340 is required for commercial vehicle and truck knuckles where peak cornering and braking loads are much higher. Using the wrong grade is a common cause of field failures — Shivam Forge will not substitute grades without customer approval.
We machine bearing seats, ball joint bores, king pin bores and hub interfaces at our Rajkot facility in the same quality system that produced the forgings. This eliminates the documentation and traceability gaps created by splitting forging and machining between suppliers.
We supply steering knuckle forgings to CV manufacturers and automotive tier-1 suppliers in India. OEM supply requires PPAP documentation, first article inspection reports, process control plans and control charts — all of which are standard outputs of our ISO 9001:2015 quality system.
We can arrange fatigue testing of knuckle prototypes per SAE J1099 at accredited test labs and provide test reports with first article submissions. Fatigue test frequency and load spectrum are agreed with the customer's design engineer.
Shivam Forge exports steering knuckle forgings to automotive aftermarket and OEM customers in the Middle East, Africa, Southeast Asia and Europe. Export documentation includes EN10204 3.1 material certificates, CMM inspection reports and MPT records.
Forged steering knuckles sourced from Shivam Forge in Rajkot are typically 30–40% below equivalent European-manufactured forgings at the same quality level and with identical material and inspection documentation. Contact us to compare your current supply cost.
Shivam Forge is a steering knuckle forging manufacturer at Shapar GIDC, Rajkot, Gujarat, producing precision hot-forged knuckles for passenger cars, light commercial vehicles, heavy trucks, tractors and 4×4 applications. Our product range includes McPherson strut knuckles, ball joint seat knuckles, CV front axle knuckles, tractor front axle knuckles and integrated knuckle-spindle assemblies. We forge in EN19 (SAE 4140) for passenger car applications and EN24 (SAE 4340) for commercial vehicle and truck applications, with quench and temper heat treatment performed in-house to the specified hardness range.
A steering knuckle carries simultaneous bending, torsion and shear loads through a multi-arm casting — but only a forging provides the grain flow continuity through each arm junction and boss transition that gives the part its fatigue margin. The most critical design point on any knuckle is the crotch radius between the vertical king pin boss and the horizontal brake flange arm. In a forging, the grain flows around this radius following the part contour. In a casting, the grain is random at the crotch — the fatigue life is lower, and crack initiation is earlier. This is why knuckle forgings are specified for all safety-critical automotive front axle applications.
CNC machining of the critical interface dimensions — bearing seat, ball joint bore, king pin bore, hub face — is performed at our Rajkot facility within the same ISO 9001:2015 quality system that controls the forging process. Bearing seats are machined to k6 or p6 fit with Ra 0.8 μm surface finish. Ball joint seat bores are machined to H7 with gauged inspection. All critical dimensions are verified on our 3-axis CMM, and a full dimensional report accompanies every first-article submission and every production batch.
Our steering knuckle forgings supply Indian automotive OEM tier-1 suppliers for new vehicle production and aftermarket knuckle manufacturers for the replacement parts market. Export customers in the Middle East, Africa and Southeast Asia purchase our forged knuckles for truck and commercial vehicle aftermarket applications. All export shipments include EN10204 3.1 material certificates tied to the mill heat analysis, heat treatment records with temperature-time charts, hardness test reports and CMM dimensional inspection reports.
For procurement teams looking to source forged steering knuckles from India, Shivam Forge offers a genuinely integrated supply option: hot forging, heat treatment, CNC machining, CMM inspection and despatch under one roof at Shapar GIDC, Rajkot. This means one purchase order, one set of quality documents and one point of accountability from raw material to finished machined knuckle. Indian forged knuckles from our facility are typically 30–40% below European supply costs at equivalent quality. Contact us at +91 92657 72827 or sales@shivamforge.com with your drawing and annual quantity.
Passenger car knuckles are forged in EN19 (SAE 4140), quenched and tempered to 248–302 HB. Commercial vehicle and truck knuckles use EN24 (SAE 4340), Q&T to 269–311 HB for higher fatigue strength. Tractor knuckles can be in EN19 or EN24 depending on axle loading.
Price depends on part weight, complexity, steel grade and machining scope. As a guide, forged passenger car knuckle blanks in EN19 start from ₹500–900 per piece for production volumes; machined knuckles with bearing seat and ball joint bore finished are priced per drawing. Call +91 92657 72827 for a specific quotation.
Shivam Forge at Shapar GIDC, Rajkot is a leading steering knuckle forging manufacturer in India with 20+ years of experience. We manufacture passenger car, commercial vehicle, tractor and 4×4 front axle knuckles with in-house CNC machining and CMM inspection.
Yes. We CNC machine bearing seats to k6/p6 fit with Ra 0.8 μm, ball joint seat bores to H7 tolerance, king pin bores to H7/H8 with perpendicularity controlled, and hub face surfaces to flatness ±0.05 mm. All machining is done in-house on CNC lathes and VMC machines.
Yes. We manufacture heavy-duty CV front axle knuckles in EN24/SAE 4340, Q&T to 269–311 HB, with king pin bore, track rod arm boss, brake flange pilot and hub bearing face CNC machined. We supply to CV manufacturers and truck aftermarket customers.
Yes. Our McPherson strut knuckle forgings have the strut clamp collar and pinch bolt lug forged integral with the knuckle body — a design advantage over welded collars. Material is EN19, CNC finish machined with bearing seat and ABS mount per customer drawing.
For existing die profiles, the minimum order is 50 pieces. For new die development, we request a first-article run of 10–25 pieces with FAIR before moving to production. Prototype runs of 3–10 pieces are possible for development projects — call +91 92657 72827 to discuss.
Email your 2D drawing or 3D STEP file with material grade, heat treatment specification, machining scope and required quantity to sales@shivamforge.com or call +91 92657 72827. We will respond within 24 hours with pricing and lead time.
Why Choose Shivam Forge
Shivam Forge delivers precision hot-forged components from our integrated Shapar, Rajkot facility — covering forging, CNC machining, heat treatment, and quality inspection under one roof.
