Airtac SCJ50 Standard Cylinder SCJ50X275-100
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-100 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.
- BoreØ50 mm
- Nominal stroke275 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X275-100
The SCJ50X275-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap screw provides up to 100 mm of adjustment, allowing the effective stroke to be fine-tuned from 175 mm to the nominal 275 mm without replacing the cylinder. This 50 mm bore unit delivers a push force of 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa, using a 20 mm diameter piston rod.
The tie-rod construction houses an adjustable air cushion (21 mm long) for smooth deceleration and PT1/4 ports. The body length A for this SCJ configuration is 194 mm plus stroke. Operating on 40 µm filtered air, it functions reliably from -20 to +70 °C with its standard TPU seals, making it a versatile solution for applications where the end position needs regular on-machine tweaking.
Airtac SCJ50 Standard Cylinder SCJ50X275-100 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-100 |
|---|---|
| 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.
Theoretical Output Force (Ø50mm)
| 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.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X275-100
| 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X275-100 Is Used
Commissioning & Setup
Dial in the exact 175-275 mm stroke end position on a new assembly line without swapping cylinders or machining custom stops, speeding up initial machine bring-up.
Product Changeover
Quickly adjust the push-off or stop position for different product sizes on a packaging conveyor, reducing downtime between batch runs.
Wear Compensation
Compensate for mechanical wear in tooling or gripper pads over time by slightly extending the cylinder's end stop, maintaining consistent part contact without a full rebuild.
Is the Airtac SCJ50 Standard Cylinder SCJ50X275-100 the Right Cylinder?
Select this 50 mm bore SCJ when you need roughly 1000 N of push force at standard shop air and the ability to dial in the stroke end position during commissioning or changeovers. If your force requirement is lower, stepping down to a 40 mm bore (628 N push at 0.5 MPa) reduces air consumption; for significantly higher force, a 63 mm bore (1559 N push at 0.5 MPa) is the next step up. Choose a fixed-stroke SC cylinder if the stroke length is permanently fixed, as it eliminates the adjusting screw. For a direct replacement, match the 50 mm bore, 275 mm nominal stroke, 100 mm adjust range, PT port thread, and basic mounting. For this 275 mm stroke, ensure the rod is not subjected to high side loads; if lateral forces are present, add an external guide rail or switch to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X275-100 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (due to the 20 mm rod area). The maximum push force at the 0.9 MPa operating limit is 1767 N.
It can replace another AirTAC SCJ50 with a 275 mm nominal stroke and 100 mm adjust range directly. It can also replace a fixed-stroke SC50 if the extra body length for the adjusting screw is acceptable and you need the 100 mm field-adjustment feature. Ensure the port thread (PT) and mounting style match your setup.
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