The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-20S 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-20S delivers a push force of 1559 N at 0.5 MPa, making it a solid mid-range actuator for tasks that need a field-tunable stroke end. Its 20 mm rear adjusting screw lets you dial in the exact stop position without swapping the cylinder or adding external hard stops, which is invaluable during commissioning and format changes.
This 63 mm bore model uses a 20 mm piston rod, PT1/4 ports, and an M16x1.5 rod thread for straightforward mounting. A built-in magnet is included, so CMSG, DMSG, or EMSG sensors can be clamped directly onto the tie-rod barrel for reliable, non-contact position sensing. The adjustable air cushion decelerates the piston smoothly, and the body length is 197 mm plus stroke.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 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. |
| ×150 | 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.
Easily fine-tune the stroke end position during machine commissioning to account for assembly tolerances, without needing to machine custom spacers or stops.
Quickly adjust the push stroke for different product sizes on a packaging or sorting line, reducing downtime between batches with a simple screw adjustment.
Periodically adjust the stroke end to compensate for wear on tooling or gripper pads, maintaining consistent part contact and process quality over time.
Step up to an 80 mm bore for a push force of 2513 N at 0.5 MPa, or down to 50 mm if 982 N is sufficient. The SCJ is the right choice when you need to fine-tune the stroke end on the machine; if the stroke is fixed and never changes, a standard SC cylinder is a simpler, more cost-effective alternative. For a direct replacement, match the 63 mm bore, 150 mm nominal stroke, 20 mm adjust range, PT port thread, and the built-in magnet (-S). At this 150 mm stroke, rod bending is not a primary concern under normal axial loads, but always align the load to minimize side forces.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The push force is higher because the single piston rod reduces the effective area on the return stroke. The maximum push force at 0.9 MPa is 2805 N.
Yes, the SCJ63X150-20S shares the same bore, nominal stroke, and mounting accessories as the SC63. The key difference is the rear adjusting screw, which lets you shorten the stroke end by up to 20 mm. Ensure your mounting arrangement has clearance for the slightly longer SCJ body.
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