Airtac SCJ100 Standard Cylinder SCJ100X250-40
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 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-40 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X250-40
The SCJ100X250-40 delivers a substantial 3927 N push force at 0.5 MPa, making it a workhorse for heavy linear positioning tasks that demand on-the-fly stroke tuning. Its rear-cap adjusting screw provides a 40 mm stroke-end reduction range, allowing operators to dial in the exact stopping position without dismounting the cylinder or adding external hard stops.
This 100 mm bore single-rod cylinder uses a 25 mm diameter rod and PT1/2 ports, with a 29 mm air cushion to decelerate the piston smoothly. The body length A(SCJ) is 245 mm, and the maximum standard stroke for this bore is 1500 mm. At the upper 0.9 MPa operating pressure, push thrust reaches 7068 N.
Airtac SCJ100 Standard Cylinder SCJ100X250-40 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 40 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 SCJ100X250-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ100X250-40 Is Used
Format Changeovers
Quickly adjust the end position by up to 40 mm when switching between product sizes on packaging or filling lines, eliminating mechanical stop changes.
Clamping & Pressing
Dial in the precise clamp depth or press stroke for different workpiece thicknesses in assembly fixtures, using the 7068 N max push force at 0.9 MPa.
Material Stops & Gates
Fine-tune the retract or extend position of a heavy-duty material stop on a conveyor, accommodating varying pallet or part dimensions without tools.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-40 the Right Cylinder?
Choose the SCJ100X250-40 when you need the 3927 N push force at 0.5 MPa and the flexibility to fine-tune the stroke end by up to 40 mm during commissioning or product changeovers. If your force requirement is lower, stepping down to the 80 mm bore (2513 N push at 0.5 MPa) reduces air consumption and physical size. For applications needing a fixed, non-adjustable stroke, the standard SC100X250 is a simpler, slightly shorter alternative. A direct replacement must match the 100 mm bore, 250 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting style. For this 250 mm stroke, ensure the rod is guided if significant side loads are present, or consider an external guide rail to prevent rod bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ100X250-40 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 7068 N. The theoretical maximum at 1.0 MPa is 801 kgf.
A screw in the rear cap allows you to shorten the stroke end position by up to 40 mm. This sets a new mechanical stop for the piston, letting you fine-tune the stroke in the field without replacing the cylinder or altering the nominal 250 mm rating.
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