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Key-Type Differential Winding

Key Slip Shaft

Key slip shafts use rectangular metal or rubber keys to expand and contact the core for controlled differential winding.

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Key Slip Shaft shaft view 1
Key Slip Shaft shaft view 2

Slip Shaft

Controlled winding torque for slit roll quality.

3-inch and 6-inch winding cores, especially rubber and aluminum cores requiring key-type core contact.

  • Configured with key-type slip rings using rectangular metal keys or rectangular rubber keys.
  • Available for center-air and side-pressure key-type slip ring structures.
  • The key contact structure provides controlled core engagement for differential winding.
Key TypesRectangular metal key or rectangular rubber key
3-inch Ring75.5 mm OD, 78.2 mm expansion point
6-inch Ring151 mm OD, 155.5 mm expansion point
Core MaterialsRubber and aluminum cores
Widths3-inch: 10-50 mm; 6-inch: 25-50 mm

Slip Ring

Slip ring options and core-contact details

Slip rings are shown as compact thumbnails because many source images are small. This keeps the visual quality natural while still showing the available ring forms.

Key Slip Shaft slip ring 1
Key Slip Shaft slip ring 2
Key Slip Shaft slip ring 3
Key Slip Shaft slip ring 4
Key Slip Shaft slip ring 5
Key Slip Shaft slip ring 6
Key Slip Shaft slip ring 7
Key Slip Shaft slip ring 8
Key Slip Shaft slip ring 9
  • 3-inch and side-pressure ring outside diameter is 75.5 mm, expanding to 78.2 mm.
  • Suitable 3-inch core inner diameter is 76.2 +/- 0.2 mm for rubber or aluminum cores.
  • Standard widths include 10, 15, 20, 25, 30, 35, 40 and 50 mm; other widths can be designed to order.
  • Inner diameter options include 50 mm and 55 mm with bearing; other dimensions can be made to match the shaft core.
  • 6-inch ring outside diameter is 151 mm and expands to 155.5 mm.
  • Suitable 6-inch core inner diameter is 152.4 +/- 0.2 mm for rubber or aluminum cores.
  • 6-inch standard widths include 25, 30, 35, 45 and 50 mm; other sizes can be customized.

Selection Notes

Confirm core material, core inner diameter, required width, winding tension range, shaft structure and whether the application needs low starting tension or higher roll-holding force.

Technical Data

Pull force and pressure reference tables

Values are translated from the supplied product document and should be confirmed against the actual shaft structure, ring width, groove material and air path before final selection.

Key Slip Shaft Pull Force, Kraft Material, Low Pressure Range

Test condition: 3-inch key-type slip ring, 30 mm width, 100 mm outside diameter, 60 mm inner diameter, 20 x 3 groove with kraft material.

Air Pressure (kg/cm2)00.20.40.60.81.01.21.41.61.82.02.22.4
Pull Force (kg)0.160.190.380.570.781.001.321.481.882.272.642.883.12

Key Slip Shaft Pull Force, Kraft Material, High Pressure Range

Continuation of the 3-inch key-type slip ring kraft-material test.

Air Pressure (kg/cm2)2.62.83.03.23.43.63.84.04.24.44.64.85.0
Pull Force (kg)3.333.804.034.234.414.744.785.235.435.645.826.156.36

Key Slip Shaft Pull Force, Wool Felt, Low Pressure Range

Test condition: 3-inch double-ball slip ring, 25 mm width, 60 mm inner diameter, 20 x 3 groove with wool felt.

Air Pressure (kg/cm2)00.20.40.60.81.01.21.41.61.82.02.22.42.62.83.0
Pull Force (kg)0.020.040.110.230.420.640.801.031.231.471.641.862.022.282.432.65

Key Slip Shaft Pull Force, Wool Felt, High Pressure Range

Continuation of the wool-felt groove test.

Air Pressure (kg/cm2)3.23.43.63.84.04.24.44.64.85.05.25.45.65.86.0
Pull Force (kg)2.833.033.253.473.673.844.014.284.484.624.835.035.265.465.67

Related Slip Shaft Types

Air Slip Shaft

Air slip shafts combine pneumatic core locking with controlled differential slip for accurate torque and stable multi-roll winding.

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Low Tension Slip Shaft

Low tension slip shafts use roller positioning balls and bearings to start and regulate winding at very low air pressure.

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DS Slip Shaft

DS slip shafts provide pneumatic locking and pneumatic slip for accurate torque in medium tension film slitting and rewinding.

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Ball Slip Shaft

Ball slip shafts can be configured as center-air, pneumatic side-pressure or mechanical side-pressure slip shafts for flexible narrow-roll winding.

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Double Ball and Roller Slip Shaft

Double ball and roller slip shafts use long cylindrical expansion points to support stable core contact and winding torque.

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