Slitting Line Manufacturer in India
Precision coil slitting lines engineered and built in-house since 1994
- Since 1994 - designing and building coil processing lines
- 500+ machines delivered
- 19 states, 4 countries installed base
- In-house - built at our Vasai, Maharashtra plant
Friend Engineering Works designs and manufactures precision slitting lines that convert wide master coils into accurate, burr-free strips - engineered to your material, coil size and output.
Friend Engineering Works is a slitting line manufacturer in India, building precision coil slitting lines in-house at our Vasai, Maharashtra plant since 1994. Each line converts wide master coils into accurate, burr-free strips, engineered to your material, coil size and output. Our slitting lines carry the coil through the full sequence in one continuous pass - decoiling the master coil, straightening out coil set, slitting it into strips with matched rotary circular knives, holding strip tension through the separator, and recoiling the finished strips - while edge trim is drawn off to the scrap winder. Every line is engineered to the buyer's material, coil width, thickness range and throughput, and we manufacture the decoiler, slitter head, tension station and recoiler in-house at our Vasai, Maharashtra plant for single-source accountability. Our slitting lines process cold-rolled and hot-rolled steel, stainless steel, galvanised (GI/GP) coil and aluminium, handling coils up to 2000mm wide and 0.10-10mm thick to a slit-width accuracy of ±0.1mm.
Slitting Line Specifications
| Specification | Value |
|---|---|
| Coil Width Capacity | Up to 2000mm |
| Thickness Range | 0.10mm - 10mm |
| Maximum Coil Weight | Up to 40 tons |
| Line Speed | High/Medium as per requirement |
| Control System | PLC with HMI Touch Panel |
| Compatible Materials | Cold Rolled, Hot Rolled, Stainless Steel, GI/GP, Aluminium |
| Power Supply | 415V, 3 Phase, 50Hz |
| Slitting Accuracy | ±0.1mm |
Key Features
- PLC + HMI Controlled Line: Programmable logic control with an HMI touch panel for precise, repeatable, operator-friendly running of the full line
- Wide Thickness Range: Processes coil from 0.10mm up to 10mm thickness with consistent slit quality across the gauge range
- Matched Rotary Knife Slitting: Precision-ground circular knives and spacers set clean, burr-controlled edges strip after strip
- Controlled Strip Tension: Separator and tension station keep strips flat and tightly wound for stable, telescope-free recoiling
- Heavy-Duty Build: Robust welded construction designed for continuous industrial duty and long service life
- Custom-Engineered to Your Coil: Decoiler, slitter head and recoiler sized to your material, coil width, thickness and output - not off-the-shelf
How Does a Slitting Line Work?
A slitting line is a metal processing system that converts wide master coils into multiple narrower strips of precise widths. The process uses rotary circular knives mounted on arbors to make continuous longitudinal cuts through the metal strip. Understanding the slitting process helps you optimize production efficiency and output quality.
- Coil Loading & Decoiling: The master coil is loaded onto the decoiler using a coil car. The hydraulic expansion mandrel grips the coil securely. The strip is then fed into the line at controlled speed.
- Strip Straightening: The material passes through pinch rolls and a straightener to remove coil set and ensure the strip enters the slitter head flat and aligned.
- Precision Slitting: Rotary circular knives mounted on upper and lower arbors cut the strip into multiple narrower widths. Knife overlap and clearance are precisely set for clean, burr-free edges.
- Scrap Collection: Edge trim (scrap) from both sides is separated and wound onto scrap winders for recycling. This ensures only usable strips proceed downstream.
- Tension Control: The slit strips pass through a loop pit or tension station where controlled tension is applied to each strip individually before recoiling.
- Recoiling: Individual strips are wound onto the recoiler with separator discs between each coil. Proper tension ensures tight, uniform coils ready for shipment or further processing.
Types of Slitting Lines We Manufacture
Friend Engineering Works manufactures various slitting line configurations to match different material types, thicknesses, and production requirements. Choose the right type based on your processing needs.
| Type | Capacity | Best For | Features |
|---|---|---|---|
| CR (Cold Rolled) Slitting Line | 0.10mm - 3mm thickness | Precision applications requiring excellent surface finish | High-precision slitter head; Gentle material handling; Surface protection systems; Tight width tolerances ±0.1mm |
| HR (Hot Rolled) Slitting Line | 1.5mm - 10mm thickness | Heavy-gauge materials for structural applications | Heavy-duty construction; High-torque drives; Robust slitter arbors; Scale-resistant components |
| Stainless Steel Slitting Line | 0.3mm - 6mm thickness | SS 304, 316, 430 grades requiring surface protection | Plastic interleaving option; Paper application; Scratch-free handling; Precision edge quality |
| High-Speed Slitting Line | Up to 150 m/min | High-volume production with quick turnaround | Advanced tension control; Quick changeover; Automated operation; Continuous production capability |
Key Components of a Slitting Line
A complete slitting line consists of several precision-engineered components working in synchronization. Each component plays a critical role in achieving consistent output quality.
- Decoiler: Holds and unwinds the master coil at controlled speed. Features hydraulic expansion mandrel and optional coil car for safe loading.
- Pinch Roll Unit: Guides the strip into the line and maintains proper tension between decoiler and slitter head.
- Edge Trimmer (Optional): Removes damaged or irregular coil edges before slitting for consistent strip widths.
- Slitter Head: The heart of the line-precision circular knives on arbors perform the actual cutting. Adjustable for various width combinations.
- Scrap Winder: Collects and winds edge trim into manageable coils for recycling. Automatic ejection for continuous operation.
- Loop Pit / Looper: Creates a buffer zone allowing speed variations between slitting and recoiling. Maintains strip tension.
- Tension Station: Applies individual tension to each slit strip ensuring tight, uniform recoiling.
- Recoiler: Winds finished strips with separator discs. Features expanding drum and provisions for strapping.
Industries Using Slitting Lines
| Industry | Application | Benefits |
|---|---|---|
| Steel Service Centers | Processing master coils into customer-specified widths | Add value through precision slitting, quick delivery to end users |
| Pipe & Tube Manufacturing | Preparing slit strips for ERW and spiral welded tube production | Consistent strip width ensures quality welds and uniform tube dimensions |
| Automotive Industry | Producing strips for stamping, body panels, structural components | High precision and surface quality for critical automotive parts |
| Electrical Laminations | Slitting silicon steel for transformer and motor laminations | Burr-free edges minimize core losses in electrical applications |
| Roll Forming | Preparing strips for roll forming profiles, sections, and shapes | Accurate width ensures consistent formed profiles |
| Appliance Manufacturing | Producing strips for washing machine drums, refrigerator panels | Surface quality and dimensional accuracy for appliance components |
Why Choose Friend Engineering Works Slitting Lines?
Compare our slitting line specifications with industry standards to see the Friend Engineering Works advantage.
| Feature | Friend Engineering Works |
|---|---|
| Manufacturing Experience | Since 1994 |
| Maximum Coil Weight | Up to 40 tons |
| Width Tolerance | ±0.1mm |
| Line Speed | Up to 150 m/min |
| After-Sales Support | Pan-India coverage |
| Customization | Full custom solutions |
| Installation & Training | Included |
Applications
- Steel Service Centers
- Pipe & Tube Manufacturing
- Automotive Component Manufacturing
- Roll Forming & Profiling
- Appliance & White Goods Manufacturing
- Electrical Panel & Lamination Manufacturing
Benefits
- Accurate, repeatable strip widths to ±0.1mm
- Burr-controlled edges ready for downstream forming
- Higher coil yield with less edge and end scrap
- Continuous single-pass processing for throughput
- Quick coil changeover between jobs
- In-house build, installation, commissioning and support
Slitting Line Maintenance Guide
Daily
- Inspect slitting knives for wear or damage
- Check lubrication levels
- Clean debris from loop pit
- Verify tension settings
Weekly
- Lubricate all moving parts
- Check belt tensions
- Inspect hydraulic hoses
- Clean separator discs
Monthly
- Verify arbor alignment
- Inspect bearing conditions
- Check electrical connections
- Calibrate measuring systems
Quarterly
- Comprehensive bearing inspection
- Hydraulic system service
- Knife resharpening or replacement
- Full system alignment check
Frequently Asked Questions about Slitting Line
What is a slitting line and how does it work?
A slitting line is industrial equipment that cuts a wide metal coil lengthwise into narrower strips of precise width. The coil moves through the line in one continuous pass: decoiling (unwinding the master coil), straightening (removing coil set), slitting (matched rotary circular knives cut the strip), tension control (the separator holds strip tension), and recoiling (winding the finished strips), while edge trim is drawn off to a scrap winder. Friend Engineering Works manufactures slitting lines that process coil from 0.10mm to 10mm thick, up to 2000mm wide, to a slit-width accuracy of ±0.1mm.
What is a slitting line used for?
A slitting line is used to cut wide metal coils lengthwise into narrower strips of exact width. Steel service centers use it to supply customer-specified widths, tube and pipe mills use it to prepare skelp, and manufacturers use it to produce strip for stamping, roll forming and laminations. Friend Engineering Works slitting lines process cold-rolled and hot-rolled steel, stainless steel, galvanised (GI/GP) coil and aluminium.
Can the slitting line be customized to my material and coil size?
Yes. Every slitting line we build is engineered to the buyer's requirement. Tell us your material and grade, coil width, thickness range, coil weight and target output, and we size the decoiler, slitter head, tension station and recoiler - and the number of strips and knife setup - to match. We have engineered and built coil processing equipment to order since 1994.
Which materials can be processed on a slitting line?
Friend Engineering Works slitting lines process cold rolled (CR) steel, hot rolled (HR) steel, stainless steel, galvanised steel (GI/GP) and aluminium coil. The slitter head tooling, knife and spacer setup and line tension are configured for the grade, thickness and finish you run. For any other material, share the grade and thickness and our engineers will confirm suitability before quoting.
What information do you need to quote a slitting line?
To prepare an accurate quotation we need: the material and grade, maximum and minimum coil width, thickness range, maximum coil weight and outer/inner diameter, the finished strip widths and number of strips required, target line speed or output, and your incoming power supply. With those details we engineer the line and provide a specification and quotation. You can share them through the enquiry form or over WhatsApp.
Do you provide installation, commissioning and operator training?
Yes. Friend Engineering Works manufactures the line in-house and supports it through installation, commissioning at your plant and operator training, so your team can run the line safely and to specification.
What are the main components of a slitting line?
A complete slitting line consists of a decoiler to unwind the master coil, entry guiding and pinch rolls, a slitter head with matched circular knives and spacers, a scrap winder for edge trim, a looping pit or looper, a separator and tension station, and a recoiler that winds the finished coils, all coordinated by a PLC with an HMI panel. We build the decoiler, slitter head, tension station and recoiler in-house at our Vasai plant.
What maintenance does a slitting line require?
Typical slitting line maintenance includes daily knife inspection, regular lubrication of moving parts, periodic alignment checks and scheduled servicing. Knife condition is the biggest factor in edge quality, so knives are re-ground on a schedule set by the tonnage and hardness of the material processed. Friend Engineering Works offers service and annual maintenance contracts for the lines we build and for lines from other manufacturers.
What is the slitting line capacity of Friend Engineering Works machines?
Friend Engineering Works slitting lines offer coil width capacity up to 2000mm, thickness range from 0.10mm to 10mm, maximum coil weight up to 40 tonnes, line speed to suit the application (high/medium), and slitting accuracy of ±0.1mm. Every line is engineered to the buyer's exact processing requirement, so capacities within this envelope are configured to your job.
Is a slitting line the same as a cut-to-length line?
No. A slitting line cuts a coil lengthwise into narrower strips that are recoiled, while a cut-to-length (CTL) line cuts a coil across its width into flat sheets of set length. They are different machines for different outputs. Friend Engineering Works manufactures both slitting lines and cut-to-length lines, so we can advise which fits your product.