The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-50S 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a 50 mm rear-screw adjustment range on a 150 mm nominal stroke. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa, making it a robust choice for mid-range industrial tasks where the end position needs fine-tuning after installation. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This tie-rod cylinder uses a 20 mm diameter piston rod and PT1/4 ports, with a 28 mm air cushion at each end to decelerate the piston smoothly. The SCJ body length (A dimension) is 197 mm, slightly longer than the fixed-stroke SC version to accommodate the adjusting mechanism. It operates on filtered air from 0.15 to 1.0 MPa within a standard temperature range of -20 to +70 °C.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 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. |
| ×150 | 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.
During machine commissioning, the 50 mm adjustment screw allows engineers to precisely dial in the stroke end position without modifying hard stops, dramatically reducing setup time for new production lines.
Ideal for packaging or handling systems that process multiple product sizes. The stroke can be quickly re-adjusted via the rear screw to accommodate different box heights or pallet sizes without swapping the cylinder.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on tooling or seals over time, maintaining consistent contact pressure and part quality without immediate cylinder replacement.
Select this SCJ63 model when your application requires a 63 mm bore's force class (1559 N push at 0.5 MPa) and the flexibility to adjust the stroke end by up to 50 mm. If a higher force is needed, stepping up to an 80 mm bore provides 2513 N of push force at the same pressure. For applications where the stroke is fixed and never needs field adjustment, the standard SC63X150 fixed-stroke cylinder is a more economical alternative. This SCJ63X150-50S is a direct replacement for any AirTAC SCJ63 cylinder with a 150 mm nominal stroke, a 50 mm adjust range, PT ports, a basic mount, and a magnet.
Adjustable-stroke checklist
The output force depends on the operating pressure. At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (reduced due to the 20 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 3118 N. Always use the pull force value for retraction calculations.
A screw mechanism in the rear cap acts as an internal, adjustable end-stop for the piston's return stroke. Turning the screw shortens the effective stroke by up to 50 mm from the 150 mm nominal maximum. It only adjusts the stroke end position and does not change the cylinder's speed or force output.
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