The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-30SFA 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, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X75-30SFA is a 63 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. The rear-cap adjusting screw provides a 30 mm adjustment range, allowing you to fine-tune the stroke end position from 45 mm up to the nominal 75 mm. This model delivers a push force of 1559 N at 0.5 MPa, driven by a 20 mm diameter piston rod.
This specific configuration includes a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors and a front rectangular flange (FA) for secure panel or end-face mounting. The body length A for this SCJ series is 197 mm, and it uses PT1/4 ports with an M16x1.5 rod thread. The adjustable air cushion decelerates the piston smoothly at the end of its travel, protecting the end cap.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-30SFA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 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. |
| ×75 | 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 adjustment screw lets technicians dial in the exact stroke end position during machine commissioning, eliminating the need to swap cylinders or fabricate external hard stops.
On packaging or sorting lines, the stroke can be quickly re-adjusted to handle different product sizes or box formats, reducing downtime between production runs.
Ideal for clamping or pressing fixtures where the final position must be precisely set to compensate for part tolerance variations or tooling wear over time.
Choose this 63 mm bore for applications needing a push force up to 1559 N at standard plant pressure. If your force requirement is lower, the 50 mm bore SCJ series provides 982 N of push force at the same 0.5 MPa. For higher force demands, stepping up to an 80 mm bore delivers 2513 N. The SCJ is the right choice when you need to adjust the stroke end on the machine without replacing the cylinder; if the stroke is fixed and never changes, a standard SC series cylinder is a more economical alternative. For strokes of 75 mm, rod bending is not a primary concern, but always ensure the load is guided to prevent side forces on the rod bearing. This model directly replaces another AirTAC SCJ63X75-30 with a magnet and FA front flange.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 1559 N, and the pull force on the rod retraction is 1402 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 3118 N. The force is identical to a fixed-stroke SC63 cylinder.
Yes, this model includes the -S suffix, meaning it has a built-in magnet on the piston. You can directly clamp an AirTAC CMSG, DMSG, or EMSG series reed or solid-state sensor onto the barrel's sensor groove to detect piston position.
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