The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X210-20STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 210mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X210-20STC is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw, allowing you to fine-tune the stroke end position by up to 20 mm without removing the cylinder from the machine. With a 63 mm bore and a 20 mm diameter piston rod, this model delivers a substantial 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a strong choice for mid-range industrial tasks that require precise end-stop calibration.
This specific configuration includes a built-in magnet for easy mounting of CMSG/DMSG/EMSG sensors and is equipped with a centre trunnion (TC) mount, supplied with the TCM1 bracket (F-SC63TC), ideal for applications where the cylinder needs to pivot. The cylinder uses a PT1/4 port, has a 28 mm air cushion for smooth deceleration, and operates within a standard temperature range of -20 to +70 °C with its default TPU seals.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X210-20STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 210 mm |
| Stroke adjustment | Up to 20 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. |
| ×210 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20 mm adjustment screw lets technicians quickly fine-tune the end position of a 210 mm stroke actuator during initial machine setup, eliminating the need for shims or custom mechanical stops.
On a packaging line, the stroke can be easily adjusted to accommodate different box sizes, allowing a single 63 mm bore cylinder to handle multiple formats without a tool change.
In clamping or pressing operations, the stroke can be slightly extended over time to compensate for wear on tooling or the workpiece, maintaining consistent force application.
Select the SCJ63 when your application needs a force level around 1559 N at 0.5 MPa. If you require a more compact unit with less force, step down to the SCJ50 bore, which provides 982 N of push force at the same pressure. For higher force demands, the SCJ80 bore offers 2513 N. This adjustable-stroke model is the right choice over a fixed-stroke SC when you need to dial in the exact stroke end during commissioning or for different product setups. For a direct replacement, ensure the new cylinder matches the 63 mm bore, 210 mm nominal stroke, 20 mm adjustment range, PT port thread, centre trunnion mounting (TC), and integrated magnet (S). For this 210 mm stroke, the standard guide rods are sufficient for most axial loads, but consider an external guide if significant side forces are present.
Adjustable-stroke checklist
At 0.7 MPa operating pressure, this 63 mm bore cylinder generates a push force of 2182 N and a pull force of 1402 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, the SCJ63 is dimensionally based on the SC series but includes a rear adjusting screw, making the overall body length slightly longer. For a direct functional replacement, ensure the bore (63 mm), port thread (PT1/4), and mounting style (centre trunnion) match your current setup.
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