How to Choose a C/Z Purlin Roll Forming Machine (2026 Buyer Guide)

Start with the sections you sell, not the machine

Before comparing machines, write down every purlin size your customers actually order: web depth, flange width, lip, thickness and steel grade, plus the hole pattern. A machine is built around that list. Sellers who quote without asking for it are guessing, and the gap usually shows up at commissioning when one of your sizes does not fit the roll tooling.

• Size range: the web, flange and lip range the rolls are adjusted across. Ask which of your sizes need a roll change and which are a simple adjustment.
• Thickness range: the thickest high-strength section sets the motor, shaft and frame size. The thinnest sets how well small sections stay straight.
• Holes: bolt-hole spacing and slot shapes are punched in line, so the punching die must match your connection details.

C/Z/U machine or C/Z quick-change line?

	C/Z/U purlin machine	C/Z quick-change line
Sections	C, Z and U families	C and Z on one frame
Cutting	Punching + hydraulic post-cut after forming	Pre-cut: level, punch and cut flat, then form and straighten
Size change	Adjusted within the machine range	Switches between C and Z without a second machine
Catalogue range	1.5 to 3 mm, web 100 to 300 mm, flange 40 to 80 mm, lip 15 to 20 mm	1.5 to 3 mm, web 100 to 300 mm, flange 40 to 80 mm, lip 20 mm
Best for	Shops selling mostly one section type in volume	Builders and steel suppliers asked for both C and Z

Both are catalogued with 16 roll stations (depends on the profile), an 18.5 kW main motor, an 11 kW hydraulic station and 10 to 15 m/min forming speed. Specs: C/Z/U purlin machine and C/Z quick-change machine.

Post-cut vs pre-cut in plain terms

Post-cut forms the strip and then cuts the finished section with a die shaped to the profile. The line runs continuously with no gap between pieces. The catch: every section shape needs its own cutting die, so a wide size range means more dies.

Pre-cut cuts the flat strip before it is formed, so one flat blade covers every size and there is no die to change. The catch: a short gap between pieces, so output per hour is a little lower than post-cut at the same forming speed.

If you run long batches of a few sizes, post-cut usually wins. If you change size often for small orders, pre-cut saves die cost and changeover time.

Seven questions to ask any seller before paying a deposit

1. Can you send a running video of a machine forming a section close to mine, not a stock clip?
2. Which of my sizes are an adjustment and which need a roll change? How long does each take?
3. What is the roll and shaft material, and the cutting blade material?
4. Which PLC and which hydraulic components are fitted, and can I buy those parts locally?
5. What is the warranty, and does it start at shipment or at commissioning?
6. Is remote commissioning included? What does an on-site engineer cost and who pays travel?
7. Which spare parts and wear items ship with the machine?

A seller who answers these in writing, with your profile in front of them, is a lower risk than one who sends a price first and asks questions later.

What we need from you to quote

• Profile drawing with dimensions, or a sample piece measured with a tape
• Material, steel grade and thickness range
• Coil width and coil weight you buy
• Lengths you cut and rough daily output
• Hole pattern and spacing
• Site power supply (voltage, phase, frequency) and destination port

Send your purlin drawing for a quote in 12 hours →

Taokron purlin lines are built to your drawing. Taokron (Melbourne) handles drawing review, quotation, pre-shipment inspection, shipping and after-sales support. Lead time is about 60 working days from drawing approval and deposit; warranty is 12 months from commissioning, with remote video support included.

FAQ

What is the difference between a post-cut and a pre-cut purlin machine?

A post-cut machine forms the strip first and then cuts the finished section with a hydraulic die shaped to the profile. Output is continuous with no gap between pieces, but each section shape needs its own cutting die. A pre-cut machine cuts the flat strip to length before forming, so one flat blade covers every size; the trade-off is a short gap between pieces, which lowers output a little.

Can one machine make both C and Z purlins?

Yes. A C/Z quick-change line switches between C and Z sections on one frame. If you only ever make C sections, a C/Z/U machine that forms then cuts is simpler. If your customers ask for both C and Z, one quick-change line avoids buying two machines.

What thickness and sizes does a typical purlin machine cover?

The Taokron C/Z/U purlin machine is catalogued for 1.5 to 3 mm steel, web 100 to 300 mm, flange 40 to 80 mm and lip 15 to 20 mm, with 16 roll stations and a forming speed of 10 to 15 m/min. Final figures depend on your profile drawing and are confirmed on the quotation.

What should I send to get an accurate purlin machine quote?

Send the profile drawing with dimensions (or a sample piece measured with a tape), material and steel grade, thickness range, coil width and coil weight, the lengths you cut and rough daily output, the hole pattern, your site power supply and the destination port.

How long does a purlin line take to build and what warranty applies?

For Taokron purlin lines, about 60 working days from drawing approval and deposit, then sea freight. The warranty is 12 months from commissioning, with remote video support included and an on-site engineer available on request, quoted per order.

Machinery for this application

Purlin and framing lines in the Taokron range: C/Z/U purlin, C/Z quick-change, stud and track, light steel framing and all roll forming machines.