Induction Hardened Shaft

Q: What material is used for induction hardened shafts?

Kamal Hydrotech manufactures induction hardened shafts from EN8/CK45 steel and EN31 steel. EN8/CK45 is standard for hydraulic cylinder rods. EN19 and EN31 are used for high-load, high-wear applications. All materials conform to IS and DIN standards.

Q: What is the hardness of an induction hardened shaft?

The surface hardness of Kamal Hydrotech induction hardened shafts is 58–62 HRC. The hardened case depth is typically 1.5–3mm, while core hardness remains 28–35 HRC — delivering wear-resistant surface with tough, ductile core.

Q: What are the applications of induction hardened shafts?

Induction hardened shafts are used in hydraulic cylinders, pneumatic cylinders, linear motion bearing systems, machine tool guides, agricultural equipment, construction machinery, plastic injection moulding machines, and industrial tie rods. They offer better impact resistance than standard chrome plated rods.

Q: What is the difference between induction hardened shaft and chrome plated rod?

An induction hardened shaft achieves 58–62 HRC through heat treatment of the base steel, providing 1.5–3mm deep hardness and better impact resistance. A chrome plated rod has a thin 15–25 micron chrome layer over softer steel giving smoother finish (Ra 0.2μm) but less impact resistance. Both are used as piston rods; choice depends on application load and environment.

Induction Hardened Shaft – Manufacturer & Supplier in Pune, India

Induction Hardened Shaft Suppliers in Pune

Kamal Hydrotech manufactures precision induction hardened shafts from EN8/CK45 steel with surface hardness of 58–62 HRC and surface finish Ra 0.2μm. The induction hardening process selectively hardens only the outer surface to a depth of 1.5–3mm while keeping the core tough and ductile — delivering superior wear resistance without compromising machinability.

Our induction hardened shafts are precision-ground and polished to tight tolerances (f7/f8), making them a direct-fit replacement for standard hard chrome plated rods in applications demanding higher impact resistance. Available in diameters 20mm–200mm and lengths up to 6000mm. Custom sizes to drawing are accepted.

Key Features

Surface hardness: 58–62 HRC (induction hardened)
Base material: EN8 / CK45 / EN31 / EN19 steel
Surface finish: Ra 0.2 μm (max) — precision ground & polished
Case depth: 1.5 mm to 3 mm
Diameter range: 20 mm to 200 mm (custom above 200mm)
Length: up to 6000 mm | cut-to-length available
OD tolerance: f7 / f8 / g6 as per requirement
Straightness: 0.1 mm per metre max

Technical Specification of Induction Hardened Shaft

Material Grade	EN8 / CK45 / EN19 / EN31 (as per requirement)
Surface Hardness	58 – 62 HRC
Case Depth (Hardened Layer)	1.5 mm to 3 mm
Core Hardness	28 – 35 HRC
Surface Roughness (Ra)	0.2 μm (Max) – precision ground & polished
Diameter Range	20 mm to 200 mm (custom above 200 mm on request)
OD Tolerance	f7 / f8 / g6 (as per customer requirement)
Straightness	0.1 mm per metre (max)
Single Piece Length	3 metre / 6 metre / Custom cut-to-length up to 6000 mm
Shape	Round (solid bar)
Packaging Type	3-layer protective packaging
Minimum Order Quantity	1 Metre
Brand	Kamal Hydrotech
Usage / Application	Hydraulic Cylinders, Pneumatic Cylinders, Linear Motion Systems, Machine Tool Guides, Agricultural & Construction Machinery

Applications of Induction Hardened Shaft

Hydraulic Cylinders – piston rods requiring high wear resistance under pressure
Pneumatic Cylinders – lightweight, hardened shafts for smooth pneumatic actuation
Linear Motion Guide Shafts – precision shafts for LM bearings and slide units
Plastic Injection Moulding Machines – tie rods and ejector pins
Machine Tool Guideways – spindle and feed axis shafts
Agricultural Equipment – heavy-duty cylinder rods for tractors and combines
Construction Machinery – crane, excavator and loader cylinder rods

Cities We Supply To

Pune (Bhosari MIDC, Chakan, Pimpri-Chinchwad, Ranjangaon) · Mumbai · Navi Mumbai · Bangalore · Chennai · Hyderabad · Nashik · Aurangabad · Nagpur · Ahmednagar · Kolhapur · Satara · Hosur · Goa

Frequently Asked Questions – Induction Hardened Shaft

Q1 What is an induction hardened shaft?

An induction hardened shaft is a steel shaft whose surface layer is hardened using induction heating, achieving 58–62 HRC surface hardness. The core remains tough while the surface becomes highly wear-resistant, making it ideal for hydraulic cylinders, linear motion guides, and heavy industrial machinery.

Q2 What material is used for induction hardened shafts?

Kamal Hydrotech uses EN8 / CK45 steel (most common for hydraulic rods), EN31 for high-load applications, and EN19 for demanding environments. All grades conform to IS and DIN standards and are sourced from certified steel mills.

Q3 What is the hardness of an induction hardened shaft?

Surface hardness is 58–62 HRC with a case depth of 1.5–3 mm. Core hardness remains at 28–35 HRC — giving the ideal balance of wear-resistant surface and tough, impact-absorbing core.

Q4 What are the main applications of induction hardened shafts?

Induction hardened shafts are used in hydraulic cylinders, pneumatic cylinders, linear motion bearing systems, machine tool guides, agricultural equipment, construction machinery, plastic injection moulding machines, and industrial tie rods — wherever a combination of hard surface and tough core is essential.

Q5 What is the difference between an induction hardened shaft and a chrome plated rod?

An induction hardened shaft achieves 58–62 HRC through heat treatment of the base steel with 1.5–3 mm deep hardness and better impact resistance. A hard chrome plated rod has a thin 15–25 micron chrome layer over softer steel giving a smoother Ra 0.2μm finish but less impact resistance. Choose induction hardened for impact-heavy applications; chrome plated for smooth, corrosion-resistant surface.