Airtac SCJ63 Standard Cylinder SCJ63X210-50
The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X210-50 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, 210mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Nominal stroke210 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ63 Standard Cylinder SCJ63X210-50
The SCJ63X210-50 is a double-acting, single-rod tie-rod cylinder with a rear-cap adjusting screw that provides up to 50 mm of field-adjustable stroke reduction. Operating on filtered air at 0.15–1.0 MPa, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a capable mid-bore actuator for tasks that need fine end-position tuning without swapping the cylinder.
This 63 mm bore model uses a 20 mm diameter piston rod with an M16×1.5 male thread and PT1/4 ports. The integral air cushion is 28 mm long, and the SCJ body length A dimension is 197 mm—slightly longer than a fixed-stroke SC of the same bore to house the stroke-adjust mechanism. The screw sets the stroke end only; it is not a force or speed regulator.
Airtac SCJ63 Standard Cylinder SCJ63X210-50 Technical Specifications
| Model | Airtac SCJ63 Standard Cylinder SCJ63X210-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 210 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.
Theoretical Output Force (Ø63mm)
| 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.
Model Code: Airtac SCJ63 Standard Cylinder SCJ63X210-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×210 | 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.
Where the Airtac SCJ63 Standard Cylinder SCJ63X210-50 Is Used
Commissioning & Setup
During machine commissioning, the 50 mm adjust range lets technicians dial in the exact end-stop position for a 63 mm bore clamp or pusher without fabricating custom hard stops, cutting weeks from the build schedule.
Wear Take-Up on Stops
In high-cycle pick-and-place units, the rear screw can be advanced to compensate for wear on external tooling stops, maintaining precise placement with a 20 mm rod cylinder that pushes 2805 N at 0.9 MPa.
Format Changeover
A packaging line running multiple box sizes uses the SCJ63 to adjust the stroke of a flap-folding station on the fly. The 50 mm range covers the full family of products without changing the actuator or adding mechanical spacers.
Is the Airtac SCJ63 Standard Cylinder SCJ63X210-50 the Right Cylinder?
Step up to an 80 mm bore SCJ if your application needs more than the 1559 N push force this 63 mm unit provides at 0.5 MPa—the SCJ80 offers 2513 N at the same pressure. For a simpler setup where the stroke is fixed and never needs field changes, the standard SC63 fixed-stroke cylinder eliminates the adjusting screw and is a direct dimensional swap for the same bore and port thread. A direct replacement must match the 63 mm bore, 210 mm nominal stroke, 50 mm adjust range, PT thread, and basic mounting. At a 210 mm stroke, rod buckling is rarely a concern for axial loads, but if the load applies a significant side force, add an external guide rail or switch to a guided cylinder to protect the rod bearing and seal.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ63 Standard Cylinder SCJ63X210-50 FAQ
The adjusting screw only sets the stroke end position; it does not alter the cylinder's output force. At 0.5 MPa, the SCJ63 generates 1559 N pushing and 1402 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The force is determined solely by the 63 mm bore, 20 mm rod, and air pressure.
Yes, if the mounting and porting match. The SCJ63 body is slightly longer (197 mm A-dimension) to house the adjusting screw. You need to match the 63 mm bore, PT1/4 ports, and basic mounting. The SCJ adds 50 mm of stroke-end adjustability, so you can fine-tune the position that was previously set by external hard stops.
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