Airtac SCJ100 Standard Cylinder SCJ100X70-50S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø100mm bore, 70mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke70 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X70-50S
The SCJ100X70-50S is a 100 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a robust 3927 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 50 mm stroke-end reduction range, allowing engineers to fine-tune the 70 mm nominal stroke for precise commissioning, format changes, or wear compensation without removing the cylinder.
Equipped with a 25 mm diameter piston rod and PT1/2 ports, this tie-rod cylinder includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. The adjustable air cushion at each end decelerates the piston smoothly, and the body length A(SCJ) is 245 mm, making it a compact yet powerful solution for heavy-duty industrial tasks.
Airtac SCJ100 Standard Cylinder SCJ100X70-50S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 29 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ100 Standard Cylinder SCJ100X70-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | Nominal (maximum) stroke length in mm. |
| -50 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ100 Standard Cylinder SCJ100X70-50S Is Used
End-Stop Fine-Tuning
The 50 mm adjustment range allows operators to precisely set the final position of heavy tooling or clamps during initial machine setup or after a product changeover, eliminating the need for external hard stops.
Wear Compensation
In high-cycle pressing or clamping operations, the adjustable stroke can be periodically tweaked to compensate for gradual wear on tooling or seals, maintaining consistent process quality without downtime for cylinder swaps.
Variable-Part Sorting
For diverting or sorting parts of different sizes on a conveyor, the stroke can be quickly adjusted to match the new part dimension, providing a flexible automation solution with a single cylinder model.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-50S the Right Cylinder?
Choose the SCJ100X70-50S when your application requires a powerful push force of nearly 4000 N at standard shop air and the ability to dial in the stroke end position on the machine. If your force requirements are lower, stepping down to an 80 mm bore provides 2513 N of push force at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC100 series is a simpler alternative. A direct replacement must match the 100 mm bore, 70 mm nominal stroke, 50 mm adjust range, PT port thread, basic mounting, and the built-in magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ100 Standard Cylinder SCJ100X70-50S FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. The maximum operating push force at 0.9 MPa is 7068 N. The pull force is lower because the 25 mm piston rod reduces the effective area on the return stroke.
A screw mechanism in the rear cap allows you to shorten the stroke end by up to 50 mm from the 70 mm nominal maximum. This sets a new mechanical end-stop for the piston, enabling on-machine fine-tuning. It does not adjust the cylinder's speed or output force.
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