Key / Lug-Type Shafts
Expanding lugs provide discrete contact with the inside of the core. Core wall strength, engagement length and transmitted torque affect the selection.
PARTS & ACCESSORIES
Air Shaft Manufacturer for Unwind and Rewind Applications
DJH Machinery manufactures and supplies air shafts for unwind and rewind positions. Specify core size, roll load, shaft construction and installation dimensions for a custom air-shaft quotation. Share your drawing and operating conditions so the proposed shaft can be checked for fit.
Component reference · dimensions and interfaces determine compatibility
APPLICATION & REQUIREMENTS
Custom Air Shaft Manufacturing and Core-Gripping Options.
Slat-Type Shafts
Longer contact elements distribute gripping contact along the core. Review core sensitivity and the required contact geometry with the shaft drawing.
Segmented / Leaf-Type Shafts
Segmented gripping surfaces provide another construction to discuss for the required core. Confirm actual expansion range and contact pattern rather than assuming universal core compatibility.
Steel or Aluminium Body
Body material affects mass, stiffness and handling. Roll weight, support span and acceleration are needed to review shaft deflection and loading.
CONFIGURATION & SELECTION
What to Confirm Before Ordering
Core Fit
Provide core inside diameter, material, wall condition and roll width. Identify any concerns about core damage or grip.
Load and Position
State whether the shaft is used for unwinding or rewinding. Include roll weight, operating speed and torque requirements when known.
Shaft Interfaces
Share a drawing showing journals, shoulders, keys, mounting and overall length. Similar shaft bodies can have different machine interfaces.
CONFIGURATION & SELECTION
From Drawing to Replacement Part.
Start with an original drawing where available. Mark critical interfaces, contact surfaces and any dimensions measured from a worn part. Confirm the finished drawing, material, quantity and inspection requirements before manufacture or replacement.
DETAILS
A Closer Look at the Component.
FOR YOUR INQUIRY
Bring the Dimensions. Define the Fit.
Provide the details you know. Identify anything that remains unconfirmed so the discussion starts from the correct conditions.
| Requirement | What to Provide |
|---|---|
| 01 | Unwind/rewind position |
| 02 | Core ID and material |
| 03 | Roll width/weight |
| 04 | Speed/torque |
| 05 | Shaft drawing |
| 06 | Gripping style |
| 07 | Air-supply conditions |
| 08 | Quantity |
QUOTATION & SUPPLY SCOPE
Air Shaft Sourcing
For a replacement quotation, identify the core inside diameter, roll mass, shaft ends and expansion arrangement. Include the required quantity, a drawing and the operating duty. Confirm material, finish and dimensional acceptance before placing an order.
Compare the Included Scope
Identify material, finish, dimensions, mounting interfaces and quantity for each component. Agree drawings and any inspection documentation needed for the replacement.
Agree the Order and Delivery Details
Provide quantity and destination. Confirm price, currency, delivery basis, packing, production schedule and any excluded freight or import charges in the quotation.
Define Acceptance and Support
Agree dimensional, surface and material acceptance before ordering. Confirm installation responsibilities, warranty terms and replacement-part identification in the proposal.
BEFORE YOU SPECIFY
Questions Buyers Ask
Is a 3-inch core size enough to specify the shaft?
No. Roll load, shaft length, journals and the gripping arrangement also matter.
Which gripping style should I choose?
Describe the core, load and operating conditions. Confirm lug, slat or other construction in the proposed specification.
Can I use the same shaft at unwind and rewind?
Do not assume interchangeability. The loads, drive interfaces and operating conditions need to be checked.
CONTINUE EXPLORING
Explore Related Components.
YOUR MATERIAL. YOUR FINISHED ROLL.
Let’s Define Your Next Converting Project.
Share your material, roll dimensions and production requirements. Start with the information you have.