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SDE Pneumatic Core Chucks

Schlumpf’s heavy duty, pneumatic core chucks – Superior performance and quality.

Designed and manufactured by Schlumpf’s world class team in Windham, Maine.

The modular SDE expanding core chuck system offers unparalleled precision and versatility in high speed or high tension shaftless unwinding and rewinding applications where little or no variation in web tension or web position can be tolerated.

Core Sizes: 70mm – 12″
Maximum Torque: up to 19,116 in-lbs

ERT-1000 Electric Roll Turner

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SDE Heavy Duty, Pneumatic Core Chucks

The modular SDE expanding core chuck system offers unparalleled precision and versatility in high speed or high tension shaftless unwinding and rewinding applications where little or no variation in web tension or web position can be tolerated.

SDE Core Chucks are Pneumatic Core Chucks that expand with pressurized air. SDE Core Chucks provide superior roll/core gripping abilities with a high capacity actuating design.

The SDE “Base” expansion chuck allows you to easily put on larger core adapters so you can run different size cores on the same machine.

Custom core chuck designs available

SDE Core chucks are ideal for new or rebuild unwind and rewind stand applications. Schlumpf’s engineering and production team ensures your new chucks are direct dimensional replacements for your retro-fit or rebuild application.

Forged Core Chuck Bodies and Spindles

What makes SDE Core Chucks better is the fact that they are FORGED. Forgings are stronger and more durable than castings and weldments. Schlumpf Core Chucks deliver you:

  • Higher performance and capacity
  • Extremely long life
  • Less downtime
  • Less maintenance
  • Quick and easy service features

No slip-grip on all types of cores

  • paper, plastic, aluminum, steel and steel capped cores
  • long life forged steel
  • loads ranging from 4,400 lbs (2,000 kg) to 17,600 lbs (8,000 kg)
  • available in SIX (6) standard sizes

SDE chucks are supplied with Easy Service features, which allow the operator to clean or inspect the chuck, and to replace common wear parts, in minutes, without removing the chuck from the machine.

Standard SDE Core Chuck Models

Model

Core Size Ranges

Standard Core Size

Load
Capacity
lbs (kN)

Max. Torque
Range
in-lbs

SDE 16
70mm – 8″  3″  4,406 (19.6)  2,213 – 4,779
SDE 20 70mm – 8″  3″  7,059 (31.4)  3,540 – 9,381
SDE 20 70mm – 8″  6″  7,059 (31.4)  3,540 – 9,381
SDE 25 70mm – 12″  3″  7,059 – 11,015  5,930 – 11,682
SDE 25 70mm – 12″  6″  7,059 – 11,015  5,930 – 11,682

Extra-Duty Core Chuck Models

Model

Core Size Ranges

Load
Capacity
lbs (kN)

Max. Torque
Range
in-lbs

SDE 28
3″ – 12″ 8,790 – 11,015 8,107 – 14,603
SDE 30
3″ – 12″ 8,790 – 11,015 9,363 – 16,815

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ERT-1000 Electric Roll Turner

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SDE Fail Safe Core Chucks

SDE-SF Spring Force Core chucks are normally expanded; pressurized air will RETRACT the chuck. Simply put: they are virtually fool-proof.

SDE-SF Core Chucks expand with Spring Force and are retracted Pneumatically:
“Fail-Safe” – will not release the roll until inflated.

In the event of a power or pressurized air loss, the core chuck maintains grip of the core and roll.

The reverse operation of these core chucks ensures that the inflation process cannot be forgotten during machine startup which ensures the roll core is engaged. This helps ensure the material and roll are engaged during machine start and during power

Key Benefits of Fail-Safe Core Chucks:

  • Improve safety conditions for operators
    • Continue to work during loss of power or air
  • Eliminate start up web tension problems
  • Reduce damage to cores and material

Core Sizes: 70mm – 12″
Maximum Torque: up to 19,116 in-lbs

For applications than can’t afford to fail such as high-value materials or Vacuum Metalizing applications.

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Core Chuck Adapters

SDE Quick-Change Adaptor Collars

Adapt the SDE Base Core Chuck to larger core sizes in seconds.
The SDE Adaptor concept was pioneered and mastered by Schlumpf and ensures you that you are able to quickly change-over core sizes without causing additional production delays.

  • Core Chuck Adaptors are lightweight and easy to handle
  • An SDE Core Chuck Adaptor can be made for any core size, inch or metric
  • Standard core sizes available with short delivery times
  • Custom sizes available upon request.

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