Airtac SCJ100 Standard Cylinder SCJ100X25-30
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X25-30 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, 25mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke25 mm
- Stroke adjust-30 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X25-30
The SCJ100X25-30 is a double-acting, single-rod pneumatic cylinder designed for applications requiring fine-tuning of the stroke end position. With a 100 mm bore and a 25 mm nominal stroke, the rear adjusting screw provides up to 30 mm of retraction, allowing the effective stroke to be set anywhere between the full 25 mm and a fully retracted position without changing the cylinder body. It delivers a substantial 3927 N of push force at 0.5 MPa, making it suitable for heavy pressing, clamping, and positioning tasks.
This tie-rod cylinder features a 25 mm piston rod, PT1/2 ports, and an adjustable air cushion for smooth deceleration. The body length A(SCJ) is 245 mm, providing a compact envelope for its force class. The stroke-end adjustment is purely mechanical, altering the piston's stop point, and does not function as a force regulator or a load-holding lock.
Airtac SCJ100 Standard Cylinder SCJ100X25-30 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X25-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 25 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 SCJ100X25-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SCJ100X25-30 Is Used
End-Stop Calibration
Ideal for commissioning automated fixtures where the final pressing depth or clamp position must be empirically determined and set on the machine using the 30 mm adjustment range.
Wear Compensation
In high-cycle assembly systems, the adjustable stroke can be periodically advanced to compensate for wear on tooling tips or contact surfaces, maintaining consistent process quality without replacing the actuator.
Heavy-Duty Format Changeover
Used on heavy-gauge material forming or bending machines to quickly adjust the punch depth for different material thicknesses by turning the rear adjusting screw, eliminating the need for mechanical shims.
Is the Airtac SCJ100 Standard Cylinder SCJ100X25-30 the Right Cylinder?
Select the SCJ100 when you need high force in a compact 25 mm stroke envelope but require the flexibility to dial in the exact end position during setup. If the standard 3927 N push force at 0.5 MPa is insufficient, the next step up is the 125 mm bore, which provides 6136 N of push force. For applications where the stroke length is fixed and never needs adjustment, the standard SC100 fixed-stroke cylinder is a more economical choice. This model is a direct replacement for another AirTAC SCJ100X25-30 cylinder with PT ports and basic mounting.
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 SCJ100X25-30 FAQ
At the standard 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. The maximum push force at the 0.9 MPa upper pressure limit is 7068 N. Because it is a single-rod cylinder, the push force is always greater than the pull force.
A screw mechanism in the rear cap acts as an internal, adjustable end-stop for the piston. Turning the screw shortens the stroke by up to 30 mm from the nominal 25 mm maximum. It only adjusts the stroke end position and does not regulate air pressure, speed, or force.
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