Airtac SCJ100 Standard Cylinder SCJ100X25-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X25-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 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-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X25-20S
The SCJ100X25-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a substantial 3927 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 20 mm range to fine-tune the stroke end, making it ideal for applications requiring precise end-position setup without swapping the cylinder.
This model features a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors for reliable end-of-stroke detection. The 25 mm rod and PT1/2 port ensure robust flow, while the 29 mm air cushion provides smooth deceleration, all within a compact body length of 245 mm.
Airtac SCJ100 Standard Cylinder SCJ100X25-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X25-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 20 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 SCJ100X25-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X25-20S Is Used
Commissioning & Setup
Ideal for machine builders who need to fine-tune the end-stop position during initial installation and testing, saving hours of mechanical adjustment.
Format Changeover
Quickly adjust the stroke end for different product sizes on a packaging or assembly line without changing the cylinder or adding external hard stops.
Wear Compensation
Take up mechanical play or tooling wear over time by simply turning the rear screw, maintaining precise positioning without downtime.
Is the Airtac SCJ100 Standard Cylinder SCJ100X25-20S the Right Cylinder?
Select the SCJ100X25-20S when you need to precisely dial in a short stroke end position on a 100mm bore platform. If your force requirements are lower, the 80mm bore provides 2513 N of push; for higher demands, step up to the 125mm bore at 6136 N. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC series is a more economical choice. This cylinder is a direct replacement for another AirTAC SCJ100 with a 25mm nominal stroke and a 20mm adjust range, matching PT ports and a magnetic piston.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X25-20S FAQ
At 0.5 MPa, it provides 3927 N of push force and 3681 N of pull force. The push force is greater because it is a single-rod cylinder, where pressure acts on the full bore area.
Yes, if you need the ability to adjust the stroke end. The SCJ shares the same mounting footprint and port sizes as the SC series of the same bore, but the body is slightly longer to accommodate the adjusting screw.
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