Airtac SCJ100 Standard Cylinder SCJ100X250-30S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-30S 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, 250mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke250 mm
- Stroke adjust-30 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X250-30S
The SCJ100X250-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering a substantial 3927 N of push force at 0.5 MPa (7068 N at 0.9 MPa). Its rear-cap adjusting screw provides up to 30 mm of stroke-end reduction, allowing fine-tuning of the piston stop position without removing the cylinder from the machine. The built-in magnet (suffix -S) enables direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This 100 mm bore model uses a 25 mm diameter piston rod and PT1/2 ports, with an adjustable air cushion decelerating the piston over the final 29 mm of travel. The tie-rod construction keeps the body length compact at 245 mm (A dimension), making it a robust choice for heavy pressing, clamping, and material-handling tasks where the final stop point needs periodic adjustment to account for tooling wear or product changeovers.
Airtac SCJ100 Standard Cylinder SCJ100X250-30S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 250 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 SCJ100X250-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SCJ100X250-30S Is Used
End-Stop Fine Tuning
The 30 mm adjustment screw allows operators to dial in the exact stop position for pressing or forming operations, compensating for tool wear or material thickness variations without reprogramming the machine.
Product Changeover
On packaging or sorting lines, the adjustable stroke lets a single cylinder handle multiple product sizes. Switching from a tall box to a shallow tray requires only a turn of the rear screw rather than a cylinder swap.
Commissioning & Setup
During machine commissioning, the stroke can be incrementally extended from a safe short setting to the full 250 mm, preventing collisions with tooling and speeding up the debug process on complex automated cells.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-30S the Right Cylinder?
Step up to the 125 mm bore SCJ (6136 N push at 0.5 MPa) if your application demands higher force within the same stroke class, or down to the 80 mm bore (2513 N push) if this unit exceeds your energy requirements. The SCJ100X250-30S is the correct replacement for an existing AirTAC SCJ of identical bore, 250 mm nominal stroke, 30 mm adjust range, PT port thread, and built-in magnet; for fixed-stroke applications, the standard SC series eliminates the rear screw mechanism. At a 250 mm stroke, the rod is well-supported, but if the load introduces significant side forces, an external guide rail or a guided cylinder should be used 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 SCJ100X250-30S FAQ
At the standard 0.5 MPa operating pressure, it generates 3927 N of push force and 3681 N of pull force (the difference is due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the push force reaches 7068 N. Always size your compressor and valving for the peak force required by your load.
Mechanically, the mounting footprints are identical, but the SCJ body is slightly longer to house the adjusting screw. You can directly replace an SC with an SCJ if you have clearance for the extra length and need the adjustable stroke feature. Ensure the port size (PT1/2), magnet option, and mounting style match your existing setup.
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