Airtac SCJ50 Standard Cylinder SCJ50X190-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X190-40S 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. Ø50mm bore, 190mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke190 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X190-40S
The SCJ50X190-40S is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw provides up to 40 mm of stroke-end reduction, letting you fine-tune the 190 mm nominal stroke for commissioning, format changes, or wear take-up without swapping the cylinder or adding external hard stops. The 50 mm bore delivers 982 N of push force at 0.5 MPa, driven by a 20 mm diameter piston rod, and the tie-rod construction keeps it serviceable.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the barrel for reliable end-of-stroke detection. The cylinder body length A(SCJ) is 194 mm, and it uses PT1/4 ports with an M16x1.5 rod thread. It operates on 40 µm filtered air from 0.15 to 1.0 MPa, with a standard temperature range of -20 to +70 °C and an adjustable air cushion to decelerate the piston smoothly.
Airtac SCJ50 Standard Cylinder SCJ50X190-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X190-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 190 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, 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 SCJ50X190-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×190 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X190-40S Is Used
Commissioning & Setup
During machine commissioning, the 40 mm adjustment range lets technicians dial in the exact stroke end position for grippers, clamps, or ejectors without iterative disassembly, speeding up the initial setup process.
Product Changeover
On packaging or assembly lines running multiple product sizes, the adjustable stroke allows a single actuator to be quickly reconfigured for different box heights or part dimensions, minimizing changeover downtime.
Wear Compensation
In high-cycle applications, mechanical stops or tooling can wear over time. The rear adjusting screw provides a simple way to take up this slack and restore precise end-of-stroke positioning without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X190-40S the Right Cylinder?
For a 50 mm bore adjustable-stroke application, this SCJ50X190-40S provides a solid 982 N push at 0.5 MPa. If your force demand increases, stepping up to a 63 mm bore SCJ cylinder raises push force to 1559 N at the same pressure. Conversely, if space or force requirements are lower, a 40 mm bore SCJ delivers 628 N push. Because this is a single-rod cylinder, always account for the lower pull force (825 N at 0.5 MPa) when the rod side is pressurized. If you need a fixed, non-adjustable stroke, the standard SC series is the direct alternative. For a drop-in replacement, match the 50 mm bore, 190 mm nominal stroke, 40 mm adjust range, PT port thread, basic mounting, and the magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ50X190-40S FAQ
At the standard operating pressure of 0.5 MPa, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force due to the 20 mm rod reducing the piston area on the retract side. The maximum push force at 0.9 MPa is 1767 N.
Yes, this SCJ50X190-40S is a direct replacement for any AirTAC SCJ adjustable-stroke cylinder with a 50 mm bore, 190 mm nominal stroke, and a 40 mm adjustment range. Ensure your existing setup uses PT1/4 ports, an M16x1.5 rod thread, and a basic mounting style. The built-in magnet allows you to use clamp-on sensors for position feedback.
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