The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-100 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-100 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end tuning directly on the machine. Its rear-cap adjusting screw provides a 100 mm reduction range, so the effective stroke can be dialled from 75 mm up to the full 175 mm without changing the cylinder body. With a 20 mm rod, PT1/4 ports, and a 28 mm air cushion, it delivers 1559 N of push force at 0.5 MPa and can reach 2805 N at the maximum operating pressure of 0.9 MPa.
This 63 mm bore adjustable-stroke unit is a practical alternative to adding external hard stops when a process needs frequent changeover or commissioning tweaks. The tie-rod construction keeps it serviceable, and the body length A(SCJ) is 197 mm, making it compact enough for guarded stations. It is not an ISO 15552 cylinder; it is a genuine AirTAC SCJ, designed for direct replacement of another SCJ63 with the same stroke, adjust range, and port thread.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 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. |
| ×175 | 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 100 mm adjustment range lets operators quickly dial in the correct stroke for different product heights on a palletising or pick-and-place nest, eliminating the need to swap cylinders between batches.
In a woodworking or welding fixture, the rear screw can be advanced over time to compensate for jaw or pad wear, maintaining consistent clamping force without reprogramming the machine.
Fine-tune the open position of a conveyor diverter gate during commissioning. The 100 mm range allows the gate angle to be set precisely for smooth product transfer, then locked in place.
Step up to an 80 mm bore if the 0.5 MPa push force of 2513 N is needed, or down to a 50 mm bore for 982 N in a narrower envelope. Because this is a 175 mm stroke unit, rod deflection is generally not a concern under axial loads, but any side force should be managed with an external guide. Choose a fixed-stroke SC63 cylinder when the stroke never changes, or a guided cylinder if the load is offset. For a drop-in replacement, match the 63 mm bore, 175 mm nominal stroke, 100 mm adjust range, PT port thread, and basic mounting style. If the original carries an -S magnet suffix, order SCJ63X175-100S to maintain sensor compatibility.
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 rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 3117 N.
Yes, if the mounting and port positions align. The SCJ63 body is slightly longer to house the adjusting screw (A=197 mm). Ensure the 100 mm adjustment range covers your stroke variation needs, and match the port thread (PT or G) and any magnet sensor option (-S) from your original setup.
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