Multi-Size C Stud Lines: C50, C75, C100 and Spacer Width Changeover

1. What “multi-size” means

A reference drywall C stud line can produce C50, C75, and C100 on one frame by changing spacer width (and matching cutters) — not by treating three unrelated machines as one parameter sheet.

Some market packages use servo/PLC auto translation instead of manual spacers; either way, ask how long changeover takes and whether cutters swap with size.

Multi-size is a width family decision. It does not automatically include villa C140, single-size 65C hole packages, or structural C purlin duty.

2. C50/75/100 baseline

Treat this table as the multi-size English reference. Do not average it with 65C or high-speed site configs to invent a single public rating.

3. Changeover practice

• Set spacers for the target web width
• Fit the matching cut-off tooling
• Check lip / flange gauges on first pieces
• Resume production only after length and hole checks pass

If operators switch sizes daily, ask for a written changeover sequence on the proposal — spacer steps and cutter swaps should be explicit.

4. What is not the same machine

• 65C with holes — about φ40 shaft, ~10 stands, main ~3 kW, thickness ~0.4–0.8 mm; working about 10 m/min including punch/cut
• Single-size 35/65/70 packages
• Villa C140 assembly lines
• CU combined mills that change C ↔ U — different goal from C50 ↔ C75 ↔ C100 width change

Self-check: Do not publish one universal “stud machine” speed/power that blends C50/75/100 with 65C or high-speed site cases.

5. Inquiry checklist

• Exact size set required (C50/75/100 or subset)
• Spacer vs auto-translation preference and expected changeover time
• Cutter count / hole needs
• Thickness and hardness band for the multi-size class (often about 0.4–0.6 mm)
• Confirm 65C or villa is not being mixed into this rating sheet

6. Buyer FAQ

Do I need three cutters?

Often yes for multi-size — confirm blade count on the proposal. Matching cutters to each web width avoids scrap at cut-off.

Is auto size-change required?

No. Spacer change is the documented multi-size method on the C50/75/100 reference; auto translation is an optional market upgrade path.

Same power as a 65C with-hole line?

No. The 65C variant uses a different shaft, pass count, and main-motor tier — keep it on its own proposal line.