The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-40 is a double-acting, single-rod pneumatic cylinder with a 40 mm rear adjusting screw, letting you fine-tune the stroke end position from 135 mm up to the nominal 175 mm without swapping the cylinder. This 63 mm bore unit delivers 1559 N of push force at 0.5 MPa and 2805 N at the 0.9 MPa maximum operating pressure, making it a solid mid-range actuator for tasks that need on-machine stroke tweaking.
Built on the proven SC tie-rod platform, it uses a 20 mm diameter piston rod with an M16x1.5 male thread and comes with PT1/4 ports. The integrated air cushion (28 mm long) decelerates the piston quietly, and the body length A(SCJ) is 197 mm. The adjustable stroke is ideal for commissioning trials, format changeovers, or compensating for tooling wear without adding external hard stops.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 40 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. |
| -40 | 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.
Dial in the exact end-stop position during machine bring-up. The 40 mm screw adjustment lets technicians fine-tune the stroke on the fly without removing the cylinder or machining custom stops.
Quickly adapt a packaging or sorting line to a new box size or product width. Operators can shorten the stroke end by up to 40 mm in seconds, minimizing downtime between batches.
As gripper pads, press tools, or cutting blades wear down, the stroke end can be incrementally extended to maintain consistent contact pressure and cycle quality without replacing the tooling.
Step up to the 80 mm bore SCJ if your application needs more force (2513 N push at 0.5 MPa), or down to the 50 mm bore (982 N) for a lighter, faster-moving assembly. If you do not need the field-adjustable stroke, the fixed-stroke SC63X175 is a direct dimensional match. For a drop-in replacement, match the 63 mm bore, 175 mm nominal stroke, 40 mm adjust range, PT thread, and basic mounting. At this 175 mm stroke, the rod is well-supported, but for strokes over 300 mm, add an external guide rail or switch to a guided cylinder to prevent rod bending under side loads.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the difference is due to the single 20 mm rod). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
The SCJ has a rear-cap adjusting screw that lets you shorten the stroke end by up to 40 mm in the field. The SC has a fixed, non-adjustable stroke. Choose the SCJ when you need to fine-tune the end position after installation; choose the SC for a simpler, lower-cost fixed-stroke solution.
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