Airtac SCJ100 Standard Cylinder SCJ100X70-30S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-30S 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 SCJ100X70-30S
The SCJ100X70-30S is a double-acting, single-rod pneumatic cylinder with a 100 mm bore and a 70 mm nominal stroke, featuring a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. At 0.5 MPa, it delivers 3927 N of push force and 3681 N on the pull stroke, making it a powerful actuator for heavy industrial tasks. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for precise end-of-stroke detection.
This tie-rod cylinder uses a 25 mm diameter piston rod with an M20x1.5 male thread and PT1/2 port connections. The adjustable air cushion is 29 mm long, providing reliable deceleration, and the standard TPU seals operate from -20 to +70 °C. The body length (A dimension) is 245 mm, and the standard stroke can be extended up to 1500 mm for this bore size.
Airtac SCJ100 Standard Cylinder SCJ100X70-30S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-30S |
|---|---|
| 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 SCJ100X70-30S
| 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 SCJ100X70-30S Is Used
Commissioning & Setup
The 30 mm adjustable stroke allows engineers to dial in the exact end-stop position during machine commissioning, eliminating the need to machine custom spacers or swap out fixed-stroke cylinders for minor dimensional tweaks.
Product Format Changeover
On packaging or assembly lines, the stroke can be quickly adjusted to accommodate different product sizes or pallet dimensions, significantly reducing downtime between production runs.
Wear Compensation
In high-cycle clamping or pressing applications, the stroke-end screw can be periodically advanced to compensate for mechanical wear on tooling or workpieces, maintaining consistent process quality without replacing the cylinder.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-30S the Right Cylinder?
Choose the SCJ100X70-30S when you need a high-force actuator that can be fine-tuned on the machine without swapping cylinders. The 30 mm adjustment range is ideal for commissioning, format changeovers, or compensating for tooling wear. If 3927 N of push force at 0.5 MPa is more than required, stepping down to an 80 mm bore reduces push force to 2513 N; if you need even greater force, the 125 mm bore provides 6136 N.
For applications requiring a fixed, non-adjustable stroke, the standard SC100 series is a direct alternative. The exact replacement match is another AirTAC SCJ100X70-30S with a PT1/2 port, basic mounting, and the -S magnet option. For strokes of 300 mm or greater, always evaluate side-loading on the 25 mm rod; an external guide rail or a guided cylinder assembly is recommended to prevent rod bending and premature seal wear.
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 SCJ100X70-30S FAQ
The push force is 3927 N at 0.5 MPa and 7068 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower due to the single rod design, providing 3681 N at 0.5 MPa. The theoretical maximum force at 1.0 MPa is 801 kgf.
No, this is a standard double-acting cylinder and will not hold its position if air pressure is exhausted or the directional valve is centered. The adjustable screw only sets the stroke end position and does not act as a mechanical lock. To hold a load safely without live air pressure, you must add an external rod brake or a pilot-operated check valve.
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