10 µm PET and electronic film
The reason this shaft exists: it works from 0.1 kg/cm², where a DS shaft needs 0.8 kg/cm² to start at all.
Low Starting Tension Slip Shaft
Low Tension Differential Friction Shaft
Low tension slip shafts are designed for sensitive materials that require stable winding at low air pressure and low starting torque. Also known as: low tension slip shaft, low tension friction shaft.
Low-Tension Winding Function
Winding 10 µm PET from 0.1 kg/cm²
Suitable for stretch-sensitive films, thin PET film, electronic film and lithium battery-related separator film applications where low starting tension is required.
- Center-air-pressure slip shaft structure designed for low starting tension.
- Suitable for stretch-sensitive film slitting and lithium battery film slitting.
- Works from 0.1 kg/cm² air pressure, against the 0.8 kg/cm² a DS shaft needs to start. That eight times difference is the reason to choose this shaft: it is what makes 10 µm PET and separator film windable at all.
| Core Size | 3-inch standard core, 76.2 +/- 0.2 mm |
|---|---|
| Ring OD | 75.5 mm body OD, up to 77.8 mm expansion point |
| Standard Widths | 10, 15, 20, 25, 30, 35 mm |
| Standard ID | 50 mm |
| Working Pressure | From 0.1 kg/cm² (0.1 bar / 1.4 psi) — eight times lower than a DS shaft |
Where low starting pressure matters for sensitive film
Lithium separator film
Stretch-sensitive separator where any excess winding tension deforms the material.
Stretch-sensitive material generally
Any web where the roll must be wound at the lightest tension the machine can hold.
Narrow ring widths
Standard widths 10–35 mm on 3-inch cores, 50 mm inner diameter.
Slip Ring
Positioning balls and bearings in a 50 mm-bore ring
Low-tension slip rings can be selected according to core size, ring width, starting pressure, material sensitivity and winding tension requirement.
- The ring is built from roller positioning balls and bearings.
- 3-inch ring outside diameter is 75.5 mm, expanding to 77.8 mm at the highest point.
- Suitable core inner diameter is 76.2 +/- 0.2 mm for rubber, aluminum or paper cores.
- Standard widths include 10, 15, 20, 25, 30 and 35 mm; other widths can be designed to order.
- Standard inner diameter is 50 mm.
Selection Notes
Give the required starting pressure and the film type before selecting a low-tension ring width. This design is described for sensitive PET, electronic film and separator applications, with a 0.1 kg/cm² starting point. Preserve the positioning-ball and bearing arrangement in the replacement review; a matching outer diameter alone does not establish the same low-tension configuration.
Replacement Slip Rings
Replacement low-tension rings for a 0.1 kg/cm² application
Availability
Low-tension rings are supplied individually as well as for complete shafts. They can be considered for a different manufacturer’s shaft when the measured dimensions and low-tension structure match. Lead time is confirmed with the quotation once the ring arrangement and starting-pressure requirement have been reviewed.
What to measure / send
Confirm the positioning-ball and bearing structure, the listed 50 mm ring bore and the required width within the standard 10–35 mm range. State the low starting-pressure requirement, with this design working from 0.1 kg/cm². Provide the 3-inch core inner diameter, normally 76.2 mm, and its material. Include shaft keyslot or air-hole positions, quantity, and photographs of the old low-tension ring and the shaft, together with the film type and thickness.
What ships
The supplied part is a low-tension slip ring of the confirmed positioning-ball and bearing structure, configured to the agreed bore, width and friction material. Its replacement specification includes the required starting-pressure application rather than relying on the nominal three-inch core size alone.
Low starting pressure is the reason to identify this structure
The low-tension design is described as a center-air-pressure shaft for stretch-sensitive film. Its stated 0.1 kg/cm² starting point is lower than the DS design’s 0.8 kg/cm² threshold, which makes the pressure requirement central to the comparison. For a replacement used with 10 µm PET, electronic film or separator material, include the actual film and required starting condition with the ring dimensions. Those details explain why an apparently similar pneumatic ring needs review as a low-tension assembly.
Keep the low-tension test bore separate from the standard bore
Standard dimensional information lists a 50 mm inner diameter and ring widths of 10, 15, 20, 25, 30 and 35 mm. The nineteen-ring force series records a different specific specimen: a 35 mm wide roller-type ring with 54.7 mm inner diameter and a wool-felt groove, tested at 3.0 kg air pressure. That series is not a table of forces measured at the minimum starting pressure. Use the old ring measurement for replacement fit and retain the stated test condition when discussing the readings below.
Technical Reference Data
Nineteen ring readings from one stated low-tension test
Low-tension force data below retain the individual test dimensions, materials and pressure conditions; compare those conditions with the ring you need.
Low Tension Slip Ring Pull Force, Rings 1-10
Consult the category pull-force guide to interpret this nineteen-ring low-tension test.
Test condition: 3-inch roller-type slip ring, 35 mm width, 54.7 mm inner diameter, 10 x 3 groove with wool felt, at 3.0 kg air pressure.
| Slip Ring No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Pull Force | 0.35 | 0.34 | 0.35 | 0.30 | 0.32 | 0.36 | 0.36 | 0.30 | 0.35 | 0.31 |
Low Tension Slip Ring Pull Force, Rings 11-19
Continuation of the same test condition.
| Slip Ring No. | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
|---|---|---|---|---|---|---|---|---|---|
| Pull Force | 0.30 | 0.32 | 0.33 | 0.30 | 0.33 | 0.36 | 0.32 | 0.33 | 0.35 |
When starting pressure matters more than other shaft options
Air Slip Shaft
If the low-pressure film project also needs a piston-count or separate locking/regulating-air-path review, compare the air family and its dedicated ultra-low-tension versions.
View DetailsDS Slip Shaft
If the application can start at 0.8 kg/cm² and needs medium-tension laminate winding, DS is the relevant alternative to the 0.1 kg/cm² structure here.
View DetailsBall Slip Shaft
For a new job defined by minimum slit width, ball shafts provide the stated from-5-mm reference; this low-tension page instead specifies ring widths and starting pressure.
View DetailsDouble Ball and Roller Slip Shaft
When extended cylindrical contact and rubber, aluminum or paper core holding are the main requirements, compare the roller layout separately from the low-tension starting-pressure specification.
View DetailsKey Slip Shaft
A requirement for rectangular metal or rubber contact belongs in the key-ring comparison, where the friction material and key material are specified independently.
View DetailsSend a low-tension ring drawing and starting-pressure requirement
Have a drawing of your shaft or a photo of the old rings? Send it on WhatsApp or to sales@kendoric.com — we check fit before quoting.