The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X225-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X225-10S delivers a nominal 225 mm stroke with a rear-cap adjusting screw that lets you fine-tune the stroke end by up to 10 mm without removing the cylinder. Its 50 mm bore generates 982 N of push force at 0.5 MPa (1767 N at 0.9 MPa), driven by a 20 mm diameter piston rod through PT1/4 ports.
A built-in magnet is integrated into the piston, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The adjustable cushion decelerates the load over the final 21 mm of travel, and the SCJ body length measures 194 mm, making it a compact solution for setups that need on-machine stroke tweaking during commissioning or format changes.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X225-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 10 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
During machine bring-up, the 10 mm adjustment screw allows engineers to precisely set the actuator's end position without swapping shims or hard stops, speeding up the debug process.
On a packaging line switching between box sizes, the adjustable stroke lets operators quickly reset the pusher's stopping point to match the new carton length, minimizing downtime.
In a clamping or pressing fixture, the stroke can be gradually extended over the cylinder's service life to compensate for pad or tooling wear, maintaining consistent clamping force without replacing parts.
Choose this model when your application requires a mid-range push force and the ability to dial in the exact stroke end position on the machine. If you need more force, step up to the 63 mm bore (1559 N push at 0.5 MPa); for a lighter, more compact design, the 40 mm bore provides 628 N. The SCJ is the right pick over a fixed-stroke SC when you anticipate needing to compensate for wear, adjust for different product sizes, or fine-tune an end-stop during setup.
For a drop-in replacement, match the 50 mm bore, 225 mm nominal stroke, 10 mm adjustable range, PT1/4 ports, and the built-in magnet. This cylinder uses the basic mounting style, so no additional brackets are required. At this stroke length, ensure the rod is adequately supported if significant side loads are present; an external guide rail or a guided cylinder may be necessary to prevent rod bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder provides 982 N of push force and 825 N of pull force due to the single 20 mm rod. The maximum push force at 0.9 MPa is 1767 N.
A screw in the rear cap physically limits how far the piston can retract, shortening the stroke end by up to 10 mm from the 225 mm nominal maximum. It is a direct replacement for another AirTAC SCJ50 with the same 225 mm stroke and 10 mm adjustment range, but it cannot replace a fixed-stroke SC model without accounting for the slightly longer body length and the adjustment mechanism.
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