Manufacturer, Supplier & Exporter of Shafting Round Bar
Riddhi Siddhi Impex is a trusted manufacturer and supplier of high-quality Shafting Round Bars, serving a wide range of industries across India. Our Shafting Round Bars are produced using premium raw materials and engineered to meet strict dimensional tolerances and metallurgical specifications. As both a manufacturer and distributor, Riddhi Siddhi Impex controls every stage of production — from material selection and heat treatment to machining and final inspection — ensuring consistent performance for demanding shafting applications...
Our Shafting Round Bars are available in common engineering grades such as carbon steels (e.g., C45/1045), alloy steels (e.g., 4140/EN19), stainless steels (e.g., SS304, SS316), and specialty grades on request. Typical chemical and mechanical properties are tailored to the grade selected: carbon and alloy grades provide high tensile strength and wear resistance for rotating shafts and axles, while stainless grades offer corrosion resistance for marine, food, and chemical environments. Heat treatment options (annealing, normalizing, quenching & tempering) and cold finishing processes are used to reach required hardness and machinability.
Precision and dimensional variety are core strengths. Standard diameters range from small-diameter shafts (6–25 mm) to heavy-duty shafting (100 mm and above), with custom diameters and lengths manufactured to order. Riddhi Siddhi Impex offers close tolerance ground and turned bars, keyed and bored shafts, and centerless ground finishes for applications that require minimal runout and exceptional concentricity. Typical length options include cut-to-size pieces, single-piece long shafts, and bundled coil/stock deliveries for industrial buyers..
Applications for our Shafting Round Bars span automotive drive components, gearbox input/output shafts, pump and compressor shafts, transmission and coupling elements, conveyor rollers, machine tool spindles, agricultural equipment, and general-purpose industrial shafts. Engineers choose our bars when they need reliable fatigue life, accurate geometries for bearings/seals, and material traceability for safety-critical rotating machinery..
Logistics and domestic distribution are extensive: we supply Shafting Round Bars across major metropolitan and industrial centers — Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad and other industrial hubs. Whether you need a single prototype shaft delivered to a workshop in a smaller city or regular bulk shipments to large factories, we handle door-to-door logistics, export packing on request, and JIT deliveries for OEM supply chains..
Shafting Round Bar — Specification & Data
Manufacturer / Supplier: Riddhi Siddhi Impex. Values shown are typical industry ranges. For project-critical work, request Mill Test Certificate (MTC) and exact supplier test reports.
1. General Specification
| Parameter | Typical Value / Options |
|---|---|
| Product | Shafting Round Bar (Cold Finished / Hot Rolled / Centerless Ground / Turned & Ground) |
| Common Grades | C45 (1045), EN8, 4140 (EN19), 8620, 20MnCr5 (case hardening), SS304, SS316/316L |
| Surface Finish | Hot Rolled (as-rolled), Turned, Centerless Ground, Polished |
| Diameters | 6 mm — 300 mm (standard stock); custom sizes on request |
| Lengths | Cut-to-size (standard 1m, 2m, 3m, 6m) or single-piece long bars per order |
| Heat Treatment | Annealed, Normalized, Quenched & Tempered, Case Hardening ( carburized & hardened ) |
| Tolerance | ISO/DIN tolerances available; ground bars typically h7/h6; turned bars to customer tolerance |
| Certifications | MTC (EN 10204 3.1 / 2.2), Third-party inspection available |
2. Chemical Composition — Typical (wt%)
Note: these are representative compositions. For exact supplier MTC values, request batch certificate.
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Remarks |
|---|---|---|---|---|---|---|---|---|---|
| C45 / 1045 | 0.42–0.50 | 0.10–0.40 | 0.50–0.80 | <0.035 | <0.035 | <0.25 | — | — | Medium carbon steel — good hardness after quench & temper |
| EN8 (C40 / EN8) | 0.38–0.45 | 0.10–0.40 | 0.40–0.80 | <0.035 | <0.035 | <0.30 | — | — | General engineering steel |
| 4140 / EN19 | 0.38–0.45 | 0.15–0.40 | 0.60–0.90 | <0.035 | <0.035 | 0.80–1.10 | 0.15–0.25 | — | Alloy steel — high strength & toughness |
| 8620 | 0.18–0.23 | 0.15–0.35 | 0.60–0.90 | <0.04 | <0.04 | — | — | — | Low-alloy case hardening steel (carburizing) |
| 20MnCr5 (EN) | 0.17–0.22 | 0.10–0.40 | 1.00–1.40 | <0.035 | <0.035 | — | — | — | Common case-hardening grade |
| SS304 (AISI 304) | <0.08 | <1.00 | <2.00 | <0.045 | <0.03 | 17.0–19.0 | <0.10 | 8.0–10.5 | General-purpose austenitic stainless |
| SS316 / 316L | <0.08 (316) / <0.03 (316L) | <1.00 | <2.00 | <0.045 | <0.03 | 16.0–18.0 | <0.75 | 10.0–14.0 | Improved corrosion resistance; 316L for lower C |
3. Mechanical Properties — Typical Ranges
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB / HRC) |
|---|---|---|---|---|
| C45 / 1045 (normalized) | ≈ 310–350 | ≈ 560–700 | 12–16 | ~170–220 HB (~20–28 HRC after heat treat) |
| EN8 | ≈ 300–350 | ≈ 500–650 | 14–18 | ~150–220 HB |
| 4140 (quenched & tempered) | ≈ 850–1100 (depending on temper) | ≈ 950–1200 | 8–15 | ~200–400 HB (varies by temper) |
| 8620 (case hardened surface) | Surface: high after hardening; Core: 450–700 | Core tensile ≈ 700–950 | 10–16 (core) | Surface: 55–62 HRC (case); Core: ~200–300 HB |
| 20MnCr5 (case hardening) | Core: 350–650 | Core: 600–900 | 10–15 | Case hardness up to 58–62 HRC; core lower |
| SS304 | ≈ 215–275 | ≈ 520–720 | 40–60 | ~70–200 HB (work hardened varies) |
| SS316 / 316L | ≈ 215–290 | ≈ 520–700 | 40–60 | ~70–200 HB |
4. Dimension Chart — Typical Stock Sizes
Standard stocked diameters (mm). Custom diameters available on request.
| Diameter Range (mm) | Typical Availability |
|---|---|
| 6 – 12 | Ground & turned bars for precision shafts, industrial applications |
| 13 – 25 | Machine shafts, small spindles, couplings |
| 26 – 50 | General heavy shafts, bearings, rollers |
| 51 – 100 | Large shafts for gearboxes, pumps, industrial drives |
| 100 – 300+ | Very large shafts and custom forgings (made-to-order) |
| Lengths | Cut-to-length: 250 mm — 6 m; Full bars up to customer requirements |
5. Equivalent Grades & Standards
| Common Name / Grade | EN / ISO / AISI Equivalent | Typical Equivalent Standards |
|---|---|---|
| C45 | 1045 (AISI) | EN 10083-2 (medium carbon steels) |
| EN8 | — | BS970 / IS 1875 (historic); often referenced as EN8 in UK standard parts |
| 4140 | EN19 | ASTM A29 / AISI 4140; EN ISO 683-1 (alloy steels) |
| 8620 | — | EN ISO equivalents for case hardening steels (check specific standard tables) |
| 20MnCr5 | 20MnCr5 (EN) | EN 10084 / ISO case hardening grades |
| SS304 | AISI 304 | ASTM A240, EN 10088-2 |
| SS316 / 316L | AISI 316 / 316L | ASTM A240, EN 10088-2 |
6. Other Types & Variants
| Type | Description / Typical Use |
|---|---|
| Cold Drawn / Cold Finished Shafting | Improved dimensional accuracy & surface finish — used where tight tolerances are required |
| Centerless Ground | High concentricity and very fine surface finish for precision spindles |
| Turned & Ground | Precision turned to close tolerances then ground for final sizing |
| Case-Hardened Shafting | Low carbon core with hard surface (carburized/induction hardened) for wear-resistant shafts |
| Stainless Shafting | Austenitic or martensitic stainless for corrosion resistance (food, marine, chemical) |
| Alloy Steel Shafting | High strength/toughness steels for heavy duty rotating parts |
We offer value-added services including precision machining (turning, grinding, keyway broaching), balancing, surface treatments (phosphate, passivation, plating), private labeling, and inventory consignment for repeat buyers. Our production flexibility means short lead-time prototype runs and scalable series production, supported by experienced metallurgists and production engineers who help specify the optimum grade and finishing route for your application..
Frequently Asked Questions (FAQs)
- Q1: What information do I need to request an accurate quote?
- A: Provide grade, diameter, length, quantity, required surface finish (e.g., ground / turned), heat treatment (if any), and delivery city. Example: 4140, Ø40 mm x 1000 mm, centerless ground, Q&T, 50 pcs, Pune.
- Q2: Do you supply Mill Test Certificates (MTC) and third-party inspection?
- A: Yes — Riddhi Siddhi Impex supplies EN 10204 type 3.1 / 2.2 MTCs on request and can arrange third-party inspection for critical orders.
- Q3: Can you provide case hardened shafts with specific case depth?
- A: Yes — for grades like 8620 or 20MnCr5 we can deliver carburized & hardened shafts to customer-specified case depth and surface hardness (e.g., 0.8–1.2 mm to 1.5–2.0 mm at 58–62 HRC depending on process).
- Q4: What packing & shipping options are available for long-distance domestic deliveries?
- A: Options include bundled with anti-rust coating for domestic truck delivery, wooden crating for multiple bars, export-quality packing for sea shipments, and JIT consignment stock for OEM customers.
Cities we have supplied our products to
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Countries we have supplied our products to
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