The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X195-100 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, 195mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X195-100 is a double-acting, single-rod pneumatic cylinder with a 100 mm rear adjusting screw, letting you dial in the exact stroke end position between 95 mm and 195 mm on the machine. With a 63 mm bore and a 20 mm piston rod, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a strong mid-range actuator for tasks that need frequent stroke tweaking.
This tie-rod cylinder uses a PT1/4 port and an M16x1.5 rod thread, with a 28 mm air cushion at each end to decelerate the piston quietly. Its SCJ body length A is 197 mm, and it accepts the SCJ mounting subset—foot (LB), front flange (FA), or centre trunnion (TC). The standard TPU seals work from -20 to +70 °C, and an optional magnet (-S suffix) can be added for sensor mounting.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X195-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 195 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. |
| ×195 | 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.
A packaging line running different box sizes uses the 100 mm screw adjustment to quickly reset the pusher stroke end during changeovers, eliminating the need for mechanical hard stops.
In a CNC welding fixture, the adjustable stroke compensates for electrode tip wear over thousands of cycles, maintaining consistent clamping pressure without reprogramming the machine.
During new machine commissioning, engineers use the rear screw to fine-tune the 195 mm actuator's end position for a perfect part ejection trajectory, then lock the setting for production.
Choose the SCJ63 when you need the 1559 N push force at 0.5 MPa that this 63 mm bore provides. If your load is lighter, stepping down to the 40 mm bore (628 N push) saves air and space; for heavier demands, the 80 mm bore (2513 N push) is the next logical step. The 100 mm adjustment range on this model is the maximum offered, ideal for applications with wide format changes or significant wear take-up.
For a direct replacement, match an AirTAC SCJ63X195-100 with PT threads, basic mounting, and no magnet. If your application involves a 195 mm stroke with a heavy side load, consider an external guide rail or a guided cylinder to prevent rod bending, as the single rod is not designed to support lateral forces. When the stroke length is fixed and never needs field adjustment, the standard SC63X195 is a simpler, cost-effective alternative.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 1559 N and the pull force is 1402 N. The pull force is lower due to the 20 mm piston rod reducing the effective area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 318 kgf.
Yes, if you need field adjustability. The SCJ63X195-100 has the same bore, port size (PT1/4), and mounting footprint as the SC63, but its body is slightly longer to house the 100 mm adjusting screw. Ensure your machine has clearance for the extended rear cap and that the adjustable stroke range covers your required minimum and maximum positions.
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