What Information a Manufacturer Needs Before Quoting a Roll Forming Profile

Complete Profile Specification & Machine Quotation Guide

A roll forming manufacturer cannot provide an accurate quote based on:

“Trapezoidal sheet 1000 mm.”

That is incomplete.

Before quoting a profile or machine, a manufacturer needs:

• ✔ Exact profile geometry
• ✔ Material specification
• ✔ Thickness range
• ✔ Steel grade
• ✔ Coating type
• ✔ Tolerance requirements
• ✔ Production speed target
• ✔ Installation country

Without this information:

Quotes are guesses.

And guesses lead to:

• Wrong machine design

• Incorrect coil width

• Underpowered motors

• Structural failure

• Warranty disputes

Accurate quoting begins with accurate specification.

1️⃣ Profile Drawing (Non-Negotiable)

The most important requirement:

A full profile drawing.

Must include:

• ✔ Effective cover width
• ✔ Overall width
• ✔ Rib height
• ✔ Rib pitch
• ✔ Bend angles
• ✔ Return legs
• ✔ Lap details
• ✔ Tolerances

Without a drawing:

Developed width cannot be calculated correctly.

Every millimeter matters.

2️⃣ Effective Cover Width vs Overall Width

Manufacturers must know:

Effective cover (after overlap).

Example:

1000 mm effective cover may require 1200–1300 mm coil.

Confusing overall width with cover width causes:

Incorrect coil width calculation.

3️⃣ Thickness Range (Gauge)

Specify:

Minimum thickness
Maximum thickness

Example:

0.4–0.6 mm range.

This affects:

• ✔ Shaft diameter
• ✔ Motor power
• ✔ Frame strength
• ✔ Number of forming stations
• ✔ Roll gap adjustment

Multi-gauge machines cost more.

4️⃣ Steel Grade (Yield Strength)

Specify:

• G250, G350, G550
• Or
• S350GD, S450GD

Higher yield strength:

Requires stronger forming force.

Machine must be engineered for grade.

5️⃣ Coating Type

Specify:

• ✔ Galvanized (Z275, G90, etc.)
• ✔ Al-Zn (AZ150)
• ✔ Prepainted
• ✔ Aluminum

Coating affects:

• ✔ Roll surface finish
• ✔ Cutting method
• ✔ Corrosion compatibility
• ✔ Price

Painted coil requires polished rollers.

6️⃣ Intended Application

Is this for:

• ✔ Industrial warehouse
• ✔ Residential roofing
• ✔ Agricultural buildings
• ✔ Structural deck
• ✔ Solar-ready roofing

Application determines:

• Load requirements
• Rib height suitability
• Thickness requirement

7️⃣ Target Market / Country

Country matters because:

• Wind load differs
• Snow load differs
• Fire codes differ
• Corrosion class differs
• Electrical power differs

Machine must match:

Local standards + voltage.

8️⃣ Production Speed Target

Example:

• 15 m/min
• 25 m/min
• 40 m/min

Higher speed requires:

• ✔ Servo control
• ✔ Flying shear
• ✔ Stronger drive system
• ✔ Improved lubrication

Speed dramatically affects price.

9️⃣ Cutting Type

Options:

• ✔ Hydraulic stop cut
• ✔ Flying shear
• ✔ Rotary cut

Cutting type affects:

• Production rate
• Panel accuracy
• Machine complexity

Manufacturer must know this before quoting.

🔟 Coil Specifications

Provide:

• ✔ Coil width
• ✔ Coil weight
• ✔ Coil ID (e.g., 508 mm or 610 mm)
• ✔ Maximum coil outer diameter

This affects:

• Uncoiler capacity
• Line layout
• Floor space requirement

1️⃣1️⃣ Tolerance Requirements

Specify if you require:

• ✔ Tight dimensional tolerance
• ✔ High architectural finish
• ✔ Solar-compatible seam precision

High precision increases:

Tooling cost
Machine complexity

1️⃣2️⃣ Optional Equipment

Do you need:

• ✔ Auto stacker
• ✔ Coil car
• ✔ Decoiler upgrade
• ✔ Embossing unit
• ✔ Punching station
• ✔ Perforation system

Optional equipment affects total quotation.

1️⃣3️⃣ Electrical Power Supply

Specify:

• ✔ Voltage
• ✔ Phase
• ✔ Frequency (50Hz or 60Hz)

Incorrect electrical specification delays installation.

1️⃣4️⃣ Space & Layout Constraints

Provide:

• ✔ Available factory space
• ✔ Maximum line length
• ✔ Loading orientation

Line layout affects:

Machine configuration.

1️⃣5️⃣ Budget Range

Honest budget range helps:

Avoid over-specification
Avoid under-powered system

Transparent communication speeds quoting.

1️⃣6️⃣ Common Buyer Mistakes

• ❌ Sending only photo of profile
• ❌ Not specifying thickness
• ❌ Not confirming steel grade
• ❌ Not clarifying market country
• ❌ Requesting price before providing drawing

Without full information, price cannot be accurate.

1️⃣7️⃣ Manufacturer Quotation Checklist

Before requesting a quote, provide:

• ✔ Profile drawing (PDF/DWG)
• ✔ Effective cover width
• ✔ Thickness range
• ✔ Steel grade
• ✔ Coating type
• ✔ Application type
• ✔ Country of installation
• ✔ Target production speed
• ✔ Cutting type
• ✔ Coil specs
• ✔ Electrical supply

Complete information = accurate quote.

1️⃣8️⃣ Engineering Summary

A roll forming machine quote depends on:

• ✔ Geometry
• ✔ Thickness
• ✔ Grade
• ✔ Coating
• ✔ Speed
• ✔ Application
• ✔ Country
• ✔ Optional systems

Missing any of these leads to:

• Wrong pricing
• Incorrect machine design
• Future performance issues

Quoting is engineering — not guesswork.

FAQ Section

Can I get a quote without a drawing?

Not accurately.

Why does steel grade matter for pricing?

Higher grade requires stronger machine and tooling.

Does thickness range affect cost?

Yes — multi-gauge machines are more expensive.

Why does country matter?

Load requirements and electrical standards differ.

Is coil width important?

Yes — it determines machine capacity.

What is the most important document to send?

The profile drawing.