The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X650-100S 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, 650mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X650-100S is a double-acting, single-rod tie-rod cylinder with a rear-cap adjusting screw that provides up to 100 mm of field-adjustable stroke-end reduction. At 0.5 MPa, it delivers 1559 N of push force and 1402 N of pull force, making it a robust mid-range actuator for tasks that need on-machine fine-tuning without swapping the cylinder.
This model includes a built-in magnet (suffix -S), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the barrel for reliable end-of-stroke detection. The 20 mm rod, PT1/4 ports, and 28 mm air cushion are standard for the 63 mm bore, and the body length A(SCJ) is 197 mm, providing a compact footprint for its 650 mm nominal stroke.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X650-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 650 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. |
| ×650 | 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.
The 100 mm adjust range lets technicians dial in the exact stop position on a new assembly line without fabricating custom hard stops, accelerating machine bring-up.
Quickly adapt the stroke end for different box sizes on a packaging conveyor by turning the rear screw, eliminating mechanical change parts and reducing downtime between batches.
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear in tooling over time, maintaining consistent contact pressure without reprogramming the machine.
Choose the SCJ63X650-100S when you need a 650 mm stroke with the ability to dial back the end position by up to 100 mm during commissioning or format changes. If your force requirement is lower, the 50 mm bore SCJ50 series provides 982 N of push force at 0.5 MPa; for higher demands, the 80 mm bore steps up to 2513 N. For applications where the stroke never needs adjustment, a fixed-stroke SC63X650 cylinder is a simpler, more cost-effective alternative.
With a 650 mm stroke, the piston rod is extended significantly, so you must manage side loads carefully. Use an external linear guide or consider a guided cylinder if the load is not perfectly axial to prevent rod bending and premature seal wear. This cylinder is a direct replacement for another AirTAC SCJ63X650-100S with PT ports and a basic mount, or you can add an FA, LB, or TC mounting kit from the F-SC63 accessory series.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder produces 1559 N of push force and 1402 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 3118 N.
Not directly. The SCJ63X650-100S has a longer body to house the adjusting screw and is designed for applications where the stroke end needs field adjustment. It can replace another SCJ63X650-100S with the same bore, stroke, adjust range, PT ports, and magnet option. If you don't need adjustability, the standard SC63X650 is the correct fixed-stroke replacement.
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