The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X180-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X180-100S delivers a robust 1559 N of push force at 0.5 MPa, driven by a 20 mm piston rod through PT1/4 ports. Its defining feature is a rear-cap adjusting screw that provides a generous 100 mm of field-adjustable stroke-end reduction, letting you fine-tune the cylinder's stopping position without removing it from the machine.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state and reed sensors to be clamped directly onto the tie-rod barrel for precise, non-contact position feedback. The standard TPU seal ensures reliable operation from -20 to +70 °C, and the 28 mm air cushion at each end provides smooth deceleration.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X180-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 180 mm |
| Stroke adjustment | Up to 100 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. |
| -100 | 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 100 mm adjust range allows engineers to empirically dial in the perfect stroke end position for a new tooling setup without needing to swap out cylinders or machine external hard stops.
On a conveyor diverter gate, the adjustable stroke can be periodically shortened to compensate for wear on a rubber stop bumper, ensuring the gate always seals correctly without requiring immediate part replacement.
In a packaging machine, operators can quickly adjust the stroke end to accommodate different box sizes during a format changeover. The built-in magnet provides sensor confirmation that the new position is reached on every cycle.
Choose the SCJ63 bore when the 40 mm bore's 628 N push force at 0.5 MPa is insufficient, but the larger 80 mm bore's 2513 N is excessive for your application. The 100 mm adjustment range is ideal for applications requiring significant end-position variability. For a fixed-stroke alternative without the rear screw, select the standard SC63 series. If your load creates a significant side force, particularly with this 180 mm stroke, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending.
To replace an existing unit, match the 63 mm bore, 180 mm nominal stroke, 100 mm adjust range, PT port thread, and the built-in magnet. This basic mounting version uses the cylinder body for direct attachment; for pivoting motion, the TC centre trunnion kit (F-SC63TC) can be added.
Adjustable-stroke checklist
At an operating pressure of 0.5 MPa, this single-rod cylinder generates 1559 N of push force and 1402 N of pull force. The push force is higher because it acts on the full 63 mm bore area, while the pull force is reduced by the area of the 20 mm piston rod.
A screw mechanism in the rear cap acts as an internal, adjustable end-stop for the piston. Turning the screw changes the retracted stroke end position by up to 100 mm. It does not alter the cylinder's force or speed; it only limits how far the piston rod can retract, giving you a shorter effective stroke.
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