The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X180-50S 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, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X180-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, providing a 50 mm fine-tuning range via a rear-cap screw. With a 63 mm bore and 20 mm rod, it delivers a push force of 1559 N at 0.5 MPa, making it a solid mid-range actuator for applications needing precise end-stop calibration without swapping the cylinder.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection. The cylinder body length A is 197 mm, and it features a 28 mm air cushion for smooth deceleration. The operating range is -20 to +70 °C with standard TPU seals and PT ports.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X180-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 180 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. |
| ×180 | 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.
Field technicians can dial in the exact 180 mm stroke end position with the 50 mm adjustment screw, perfect for aligning actuators with varying tooling setups during initial machine bring-up.
On packaging lines, the adjustable stroke allows operators to quickly adapt the cylinder's reach for different box or product sizes without mechanical disassembly, minimizing downtime between batches.
In clamping or pressing applications, the 50 mm adjustment range can be used to take up mechanical wear on contact surfaces over time, maintaining consistent clamping force without replacing the actuator.
Choose the SCJ63X180-50S when you need to fine-tune the stroke end position by up to 50 mm during commissioning or for format changes. If your force requirement is lower, stepping down to a 50 mm bore reduces push force to 982 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N. This adjustable-stroke unit is ideal when the exact stroke is unknown at design time, but if the stroke is fixed and never needs adjustment, the standard SC63X180 fixed-stroke cylinder is a more economical choice.
For a direct replacement, match the 63 mm bore, 180 mm nominal stroke, 50 mm adjust range, PT port thread, and the built-in magnet. The stroke is well within the 1500 mm maximum for this bore, ensuring standard availability. For strokes over 300 mm in this series, always check for potential rod bending under side loads and consider adding an external guide rail.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The force increases with pressure, reaching a maximum push of 2805 N at the 0.9 MPa operating limit. The pull force is lower due to the area of the 20 mm piston rod.
Yes, provided the mounting and porting match. The SCJ63X180-50S has the same bore, port size (PT1/4), and basic mounting footprint but adds a rear adjustment screw, making the body slightly longer. Ensure you have clearance for the screw mechanism and that the adjustable stroke feature is needed for your process.
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