Slitting & Rewinding Technical Guides

Practical, field-tested guides for slitting, rewinding and converting lines: how to size, select and maintain air shafts, differential shafts, magnetic powder brakes and clutches, tension controllers and web guiding systems. Written by XW Machinery application engineers for plant engineers and purchasing teams.

Not sure which shaft or brake fits your line? Send us your core size, roll weight and line speed — our engineers reply with a sizing recommendation.

Air Shaft for Film Rewinding Machines

How to choose an air shaft for film rewinding machines — core grip, lug vs leaf vs strip, torque and slip, balance at speed, differential options, and a practical selection...

Air Shaft for Film Rewinding Machines

How to choose an air shaft for film rewinding machines — core grip, lug vs leaf vs strip, torque and slip, balance at speed, differential options, and a practical selection...

Magnetic Powder Brake Overheating: Causes and S...

Magnetic powder brake overheating? See why unwind brakes run hot all roll long, calculate slip power as F x V / 60000, and fix the seven causes we see most.

Magnetic Powder Brake Overheating: Causes and S...

Magnetic powder brake overheating? See why unwind brakes run hot all roll long, calculate slip power as F x V / 60000, and fix the seven causes we see most.

How to Maintain an Air Expanding Shaft

Learn how to maintain an air expanding shaft — air quality, bladder and valve care, journals, safe inspection steps, and the triggers that mean repair.

How to Maintain an Air Expanding Shaft

Learn how to maintain an air expanding shaft — air quality, bladder and valve care, journals, safe inspection steps, and the triggers that mean repair.

What Is a Magnetic Powder Brake Used For?

A magnetic powder brake holds precise web tension on unwinds, loads test stands and limits torque. See 10 uses by machine, sizing rules and when to skip it.

What Is a Magnetic Powder Brake Used For?

A magnetic powder brake holds precise web tension on unwinds, loads test stands and limits torque. See 10 uses by machine, sizing rules and when to skip it.

How to Install an Air Expanding Shaft

Step-by-step guide to installing an air expanding shaft: safety checks, chuck mounting, clean air supply, runout alignment, core testing and commissioning.

How to Install an Air Expanding Shaft

Step-by-step guide to installing an air expanding shaft: safety checks, chuck mounting, clean air supply, runout alignment, core testing and commissioning.

Magnetic Powder Clutch Losing Torque: Causes an...

A magnetic powder clutch losing torque? Learn the 10 real causes behind it, a 20-minute diagnostic sequence, and the fixes that restore rated tension.

Magnetic Powder Clutch Losing Torque: Causes an...

A magnetic powder clutch losing torque? Learn the 10 real causes behind it, a 20-minute diagnostic sequence, and the fixes that restore rated tension.

How Does an Air Shaft Hold a Paper or Film Core?

Discover how an air shaft grips paper and film cores through inflatable bladder technology, radial expansion, and friction. Learn component functions and selection tips.

How Does an Air Shaft Hold a Paper or Film Core?

Discover how an air shaft grips paper and film cores through inflatable bladder technology, radial expansion, and friction. Learn component functions and selection tips.

Magnetic Powder Clutch Overheating: Causes and ...

A magnetic powder clutch overheating? Learn the 8 real causes, how to measure slip power in 15 minutes, and the cooling fixes that stop thermal drift.

Magnetic Powder Clutch Overheating: Causes and ...

A magnetic powder clutch overheating? Learn the 8 real causes, how to measure slip power in 15 minutes, and the cooling fixes that stop thermal drift.

Magnetic Powder Clutch Torque Selection Guide |...

Size magnetic powder clutch torque correctly: tension x radius formula, service factor, slip-power thermal check and a worked rewinder example for converters.

Magnetic Powder Clutch Torque Selection Guide |...

Size magnetic powder clutch torque correctly: tension x radius formula, service factor, slip-power thermal check and a worked rewinder example for converters.

How Does a Magnetic Powder Clutch Work? | XW Ma...

See how a magnetic powder clutch works: powder, coil and torque transmission explained, with sizing, slip-heat and duty-cycle tips for winders and rewinders.

How Does a Magnetic Powder Clutch Work? | XW Ma...

See how a magnetic powder clutch works: powder, coil and torque transmission explained, with sizing, slip-heat and duty-cycle tips for winders and rewinders.

Air Expanding Shaft Components and Their Functions

Learn the 8 core air expanding shaft components, how each part works, and how the assembly grips and releases a paper or film core.

Air Expanding Shaft Components and Their Functions

Learn the 8 core air expanding shaft components, how each part works, and how the assembly grips and releases a paper or film core.

Differential Shaft Slipping: Causes and Solutions

Differential shaft slipping? Diagnose worn friction rings, low slip torque, contamination, core ID errors and chuck slip — with proven fixes and prevention.

Differential Shaft Slipping: Causes and Solutions

Differential shaft slipping? Diagnose worn friction rings, low slip torque, contamination, core ID errors and chuck slip — with proven fixes and prevention.