The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X275-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. The rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, letting you fine-tune the 275 mm nominal stroke without changing the cylinder body. This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors.
With a 50 mm bore and 20 mm rod, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa. The PT1/4 ports and M16x1.5 rod thread are standard, and the 21 mm air cushion decelerates the piston smoothly. The body length A(SCJ) is 194 mm, making it a compact solution for commissioning trials and format changeovers where stroke length must be dialled in precisely on the machine.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 100 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. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -100 | 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 100 mm adjustment range allows engineers to dial in the exact stroke end position during machine commissioning without swapping cylinders or machining custom stops, accelerating line start-up.
On packaging or assembly lines, operators can quickly adjust the stroke to accommodate different product sizes or pallet dimensions, minimizing downtime between production runs.
In clamping or pressing applications, the adjusting screw can be used to take up mechanical wear in tooling over time, maintaining consistent contact without reprogramming the machine controller.
Choose the SCJ50X275-100S when you need to commission a 275 mm stroke with up to 100 mm of end-position adjustability. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder replaces any AirTAC SCJ with the same 50 mm bore, 275 mm nominal stroke, 100 mm adjustment range, PT ports, and -S magnet option.
At a 275 mm stroke, rod bending from side loads becomes a consideration. If your application imposes lateral forces, pair the cylinder with an external guide rail or switch to a guided cylinder to protect the rod and bearing from premature wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the ability to fine-tune the stroke end. The SCJ50X275-100S matches the mounting footprint of an SC50 but adds a rear adjusting screw. Ensure the replacement matches your required 50 mm bore, 275 mm nominal stroke, PT ports, and that you account for the slightly longer body length (194 mm A dimension).
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