Airtac SCJ100 Standard Cylinder SCJ100X25-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X25-20 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 SCJ100X25-20
The SCJ100X25-20 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ series, featuring a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke reduction. This allows you to fine-tune the end position without changing the cylinder, ideal for commissioning and format changeovers. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa, using a 25 mm diameter piston rod and PT1/2 port connections.
This tie-rod cylinder offers reliable performance on filtered air from 0.15 to 1.0 MPa, with an adjustable air cushion to decelerate the piston smoothly. The standard TPU seals operate from -20 to +70 °C. Its body length A dimension is 245 mm, and it accepts a subset of SC mounting accessories, including foot, front flange, and centre trunnion options. The adjustable stroke end is set via a mechanical screw and does not lock the piston when air pressure is lost.
Airtac SCJ100 Standard Cylinder SCJ100X25-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X25-20 |
|---|---|
| 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 SCJ100X25-20
| 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 SCJ100X25-20 Is Used
End-Stop Commissioning
The 20 mm adjustment screw allows technicians to quickly dial in the precise stroke end position during machine setup, compensating for minor stack-up tolerances without swapping cylinders or adding external hard stops.
Product Format Changeover
In packaging or assembly lines, the adjustable stroke lets operators change the cylinder's end position to accommodate different product sizes or pallet configurations, reducing downtime between batches.
Wear Compensation
Over time, tooling or gripper fingers can wear, changing the required stroke end. The SCJ's rear screw provides a simple field adjustment to take up this wear and maintain consistent operation without replacing the actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X25-20 the Right Cylinder?
Choose the SCJ100X25-20 when you need a high-force, short-stroke actuator with the ability to precisely dial in the stroke end on the machine. If your application requires more force, the next step up is the 125 mm bore SCJ, which provides 6136 N of push at 0.5 MPa. For less force, the 80 mm bore model delivers 2513 N. If you do not need the adjustable stroke feature, the fixed-stroke SC100 series offers a simpler, more cost-effective solution. For direct replacement, match the 100 mm bore, 25 mm nominal stroke, 20 mm adjustment range, and PT port thread of this SCJ model.
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 SCJ100X25-20 FAQ
At 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. The pull force is lower due to the area of the 25 mm piston rod. The maximum push force at the 0.9 MPa operating limit is 7068 N.
Yes, you can replace a fixed-stroke SC100 with an SCJ100X25-20 if you need the 20 mm adjustable stroke feature. Ensure the nominal stroke, port thread (PT), and mounting style match. The SCJ body is slightly longer than the equivalent SC to house the adjusting mechanism, so check the 245 mm body length A dimension for clearance.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ100 Standard Cylinder SCJ100X25-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.