The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-30S is a double-acting, single-rod tie-rod cylinder that puts fine stroke tuning directly in your hands via a rear-cap adjusting screw. With a 63 mm bore and a nominal 175 mm stroke, it delivers 1559 N of push force at 0.5 MPa, while the 30 mm adjustment range lets you dial in the exact stroke end position for commissioning or format changes without swapping the cylinder.
This model includes a built-in magnet (-S suffix), so you can clamp CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the barrel for reliable end-of-stroke sensing. The 20 mm piston rod, PT1/4 ports, and 28 mm air cushion work together to provide smooth deceleration, and the body length A(SCJ) is 197 mm.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 30 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. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -30 | 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 30 mm rear screw adjustment lets technicians precisely dial in the actuator stroke end during initial machine setup, eliminating the need to shim or reposition the cylinder body.
On packaging or assembly lines, quickly adjust the stroke end to accommodate different product sizes or tooling heights without mechanical disassembly, reducing downtime between batches.
Over time, tooling or gripper fingers can wear. The adjustable stroke allows operators to take up this slack in seconds, maintaining precise part contact without replacing components.
Choose the SCJ63 bore when your application needs around 1559 N of push force at standard plant air pressure. If you require more force, step up to the SCJ80 bore, which provides 2513 N push at 0.5 MPa; for a lighter, more compact solution, the SCJ50 bore delivers 982 N. This adjustable-stroke model is the right choice when you need to fine-tune the stroke end on the machine, but if your stroke is fixed and you don't need field adjustment, the standard SC63 fixed-stroke cylinder is a more economical alternative. For a direct replacement, match the 63 mm bore, 175 mm nominal stroke, 30 mm adjust range, PT port thread, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return stroke. The maximum push force at the 0.9 MPa operating limit is 2805 N.
No. Like all standard pneumatic cylinders, the SCJ63 will drift or drop if air pressure is lost or the directional valve is centered. The adjustable screw only sets the stroke end position and the air cushion only decelerates the piston; neither acts as a lock. If load holding is required without live pressure, you must add an external rod brake or a pilot-operated check valve.
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