The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X25-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 25mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X25-10 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke reduction. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa, making it a robust choice for applications where the end position needs fine-tuning after installation.
This tie-rod cylinder features a PT1/4 port, an M16x1.5 rod thread, and a 21 mm air cushion for smooth deceleration. The body length (A) is 194 mm. The screw sets the stroke end position within the 10 mm range, allowing operators to compensate for wear or adjust for different product formats without replacing the cylinder.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X25-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 21 mm |
| Max stroke | Up to 1200 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
Perfect for commissioning a new machine where the final actuator position must be dialed in precisely after all components are assembled, eliminating the need for shims or custom spacers.
In high-cycle clamping or pressing fixtures, the 10 mm adjustment screw can be periodically advanced to compensate for pad or tooling wear, maintaining consistent clamping force without downtime for cylinder changes.
Ideal for packaging lines running multiple product sizes where a stop position needs a minor shift. The operator can quickly adjust the stroke end by 1-10 mm to accommodate a new box or tray dimension.
Choose the SCJ50X25-10 when you need to precisely dial in a short stroke end position. If you require more force, step up to the 63 mm bore, which provides 1559 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. A direct replacement must match the 50 mm bore, 25 mm nominal stroke, 10 mm adjust range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this cylinder generates 982 N of push force and 825 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke. The maximum push force at 0.9 MPa is 1767 N.
A screw in the rear cap acts as an internal stop for the piston. Turning the screw changes the stroke end position, shortening the effective stroke by up to 10 mm from the nominal 25 mm. It does not change the cylinder's force or speed, only the point at which the piston stops extending.
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