The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-50STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X350-50STC is a double-acting, single-rod pneumatic cylinder that puts a 50 mm field-adjustable stroke range at your fingertips. Its rear-cap adjusting screw lets you fine-tune the stroke end position anywhere within that 50 mm window without swapping the cylinder, making it ideal for commissioning trials, format changeovers, or compensating for wear. With a 63 mm bore and 20 mm piston rod, it delivers a solid 1559 N of push force at 0.5 MPa, scaling up to 2805 N at the maximum operating pressure of 0.9 MPa.
This model comes factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and a TC centre trunnion mount for pivoting applications. The trunnion is supplied with the matching TCM1 bracket. The adjustable air cushion decelerates the piston smoothly at both ends, and the PT1/4 ports make for straightforward plumbing. As a genuine AirTAC component, it is built for reliable, repeatable performance in industrial automation tasks.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 50 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, 28 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×350 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
The 50 mm adjusting screw allows operators to precisely dial in the final position of tooling or a stop gate during initial machine commissioning, eliminating the need for shims or custom hard stops.
On packaging lines, the adjustable stroke lets a single cylinder handle multiple box sizes. A quick turn of the rear screw changes the pusher stroke from one product format to another, slashing changeover time.
In clamping or pressing fixtures, the adjustable stroke end can be extended over time to compensate for pad wear or material compression, maintaining consistent clamp force without reprogramming a servo axis.
Choose the SCJ63 bore when your application needs a push force around 1559 N at standard plant air pressure. If you require more force, the SCJ80 steps up to 2513 N of push at 0.5 MPa; for a lighter, more compact solution, the SCJ50 provides 982 N. This adjustable-stroke model is the right pick when you need to dial in the end position on the machine, rather than settling for a fixed stroke. If your task does not require this field adjustment, the standard SC63 fixed-stroke cylinder is a more economical alternative.
With a 350 mm nominal stroke, managing side loads is critical to prevent rod bending and premature seal wear. Always guide the load externally with a linear rail or use a guided cylinder if the force is not applied perfectly axially. For a direct replacement, match this model with another SCJ63X350-50 cylinder featuring a PT port, TC mount, and magnet.
Adjustable-stroke checklist
The cylinder is double-acting and single-rod, so push and pull forces differ. At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 3118 N. Always use the push force for clamping or pressing work.
Yes, this is a direct replacement for any AirTAC SCJ63 adjustable-stroke cylinder with a 350 mm nominal stroke and a 50 mm adjustment range. Ensure your existing setup uses a PT port, a TC centre trunnion mount, and requires a magnetic piston for sensors. The mounting bracket code is F-SC63TC.
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