The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-40S 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-40S is a double-acting, single-rod pneumatic cylinder with a 40 mm rear adjusting screw, allowing you to fine-tune the stroke end position on the fly without swapping the unit. With a 63 mm bore and a 20 mm piston rod, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa, making it a robust workhorse for mid-range automation tasks.
This model includes a built-in magnet (-S suffix), so you can directly mount CMSG, DMSG, or EMSG reed and solid-state sensors on the barrel for reliable, non-contact position feedback. The tie-rod construction, 28 mm air cushion, and PT1/4 port thread ensure it integrates smoothly into existing pneumatic setups requiring a genuine AirTAC adjustable-stroke solution.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 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. |
| ×225 | 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.
The 40 mm adjustment screw lets technicians quickly dial in the exact stroke end position during machine commissioning, eliminating the need for trial-and-error with fixed hard stops.
In clamping or pressing fixtures, the stroke can be easily extended over time to compensate for pad or tooling wear, maintaining consistent clamping force without replacing the cylinder.
For packaging or sorting lines handling different box sizes, the adjustable stroke allows operators to quickly reset the pusher's end position, minimizing downtime between production runs.
Choose the SCJ63 bore when you need more force than the 40 mm bore (628 N push) but don't yet require the 80 mm bore's 2513 N push. The 40 mm adjustable stroke range is ideal for commissioning new machinery, accommodating part tolerances, or setting precise end-stops for format changeovers. If your application does not require field-adjustable stroke, a fixed-stroke SC63 cylinder is a simpler, more cost-effective alternative.
For a direct replacement, match the 63 mm bore, 225 mm nominal stroke, 40 mm adjust range, PT thread, and the built-in magnet. This cylinder uses the basic mounting style; if you need a pivoting mount, specify the TC suffix for a centre trunnion. For strokes over 300 mm, consider an external guide rail or a guided cylinder to protect the 20 mm rod from side-load bending.
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. Because it's a single-rod cylinder, the push force is always greater than the pull force.
Yes, if you need the ability to adjust the stroke end. It matches an SC63 of the same bore, port (PT1/4), and magnet option. The body length A is 197 mm, which is slightly longer than the fixed-stroke SC version to accommodate the rear adjusting mechanism. Ensure you have the extra space for the screw housing.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.