Airtac SCJ100 Standard Cylinder SCJ100X70-30
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 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-30 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X70-30
The SCJ100X70-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop position by up to 30 mm without removing the cylinder. Its 100 mm bore generates 3927 N of push force at 0.5 MPa, scaling to 7068 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for pressing, clamping, and heavy positioning tasks.
This adjustable-stroke model uses a rear-cap adjusting screw to shorten the nominal 70 mm stroke, which is especially useful during commissioning or for accommodating tooling wear over time. The cylinder features a 25 mm diameter piston rod, PT1/2 ports, and a 29 mm air cushion for smooth deceleration. Its tie-rod body length A(SCJ) measures 245 mm, providing a rigid structure for industrial mounting.
Airtac SCJ100 Standard Cylinder SCJ100X70-30 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 30 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 SCJ100X70-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ100X70-30 Is Used
Commissioning & Setup
The 30 mm rear screw adjustment allows engineers to precisely set the end-of-stroke position during machine commissioning, eliminating the need for trial-and-error shimming and reducing setup time on new automation lines.
Wear Compensation
In high-cycle pressing or clamping fixtures, the adjustable stroke can be periodically tweaked to compensate for tooling or pad wear, maintaining consistent contact force without replacing the cylinder or adding shims.
Format Changeovers
For packaging or assembly machines that handle multiple product sizes, operators can quickly adjust the stroke end to match a new format, providing flexible automation with a single pneumatic actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-30 the Right Cylinder?
Choose the SCJ100X70-30 when you need the 3927 N push force of a 100 mm bore but require the ability to dial in the exact stroke end on the machine. If your force requirement is lower, stepping down to an 80 mm bore reduces push force to 2513 N at 0.5 MPa; for higher force, the 125 mm bore delivers 6136 N. This adjustable-stroke unit is ideal where a fixed-stroke SC would require shimming or external stops. For replacement, match the 100 mm bore, 70 mm nominal stroke, 30 mm adjust range, PT port thread, and basic mounting style. If the rod must support a heavy side load, consider adding an external linear guide or switching to a guided cylinder assembly.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ100X70-30 FAQ
At 0.5 MPa, the cylinder produces 3927 N pushing force and 3681 N pulling force (the difference is due to the 25 mm rod reducing the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N.
A rear-cap screw allows you to shorten the stroke end by up to 30 mm from the nominal 70 mm maximum. It sets a mechanical end-stop for the piston. The cylinder does not lock or hold position when air pressure is removed; if you need to hold a load without air, an external rod brake or pilot-operated check valve is required.
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