The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-40S 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 SCJ63X175-40S is a 63 mm bore, single-rod, double-acting cylinder with a 40 mm rear stroke-end adjustment screw, giving you a field-tunable effective stroke from 135 mm to 175 mm without removing the cylinder. It delivers a push force of 1559 N at 0.5 MPa and up to 2805 N at 0.9 MPa, driven by a 20 mm diameter piston rod through PT1/4 ports.
This model includes a built-in magnet (-S suffix), allowing direct clamping of CMSG/DMSG/EMSG reed or solid-state sensors to the tie-rod barrel for end-of-stroke or mid-stroke position feedback. The 28 mm air cushion decelerates the piston smoothly, and the body length A(SCJ) is 197 mm, making it a compact solution for applications needing stroke fine-tuning during commissioning or format changes.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-40S |
|---|---|
| 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.
Fine-tune the end position of a material stop or pusher during initial machine setup without fabricating shims or moving external hard stops. The 40 mm range allows rapid, tool-free adjustment.
In stamping or pressing operations, use the adjusting screw to take up mechanical slack as tooling wears, maintaining consistent product quality without replacing the actuator.
Quickly adapt a diverter gate or sorting mechanism stroke for different package sizes on a conveyor line. The sensor confirms the new end position, enabling automated format verification.
Choose the SCJ63 when you need the 1559 N push force at 0.5 MPa and the ability to dial in the stroke end by up to 40 mm. If your force requirement is lower, stepping down to a 50 mm bore SCJ reduces push force to 982 N. For higher force, the 80 mm bore provides 2513 N. This adjustable-stroke model is ideal where the exact stroke length must be empirically determined on the machine. If the stroke is fixed and known, a standard SC63 fixed-stroke cylinder is a simpler, more cost-effective choice. For strokes of 175 mm, side-loading is minimal, but ensure the load is guided if any radial force is present. A direct replacement must match the 63 mm bore, 175 mm nominal stroke, 40 mm adjustment range, PT ports, and the built-in magnet.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at the 0.9 MPa operating limit is 2805 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, this is a direct dimensional and performance replacement for any AirTAC SCJ63 cylinder with a 175 mm nominal stroke, 40 mm adjustment range, PT ports, and a built-in magnet. Confirm your mounting style; this is a basic (no bracket) configuration. For a trunnion or foot mount, order the appropriate suffix code.
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