Airtac SCJ50 Standard Cylinder SCJ50X100-40STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-40STC 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-40STC
The SCJ50X100-40STC is a 50 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 40 mm of field-adjustable stroke-end reduction, eliminating the need for external hard stops during commissioning or format changes. With a 20 mm diameter piston rod and PT1/4 ports, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, scaling to 1767 N push at 0.9 MPa.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and is fitted with a centre trunnion (TC) pivot mount, supplied with the TCM1 bracket, making it ideal for applications where the cylinder body needs to swing. The standard TPU seals provide reliable operation from -20 to +70 °C, and the adjustable air cushion decelerates the 100 mm nominal stroke smoothly.
Airtac SCJ50 Standard Cylinder SCJ50X100-40STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-40STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 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 SCJ50X100-40STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SCJ50X100-40STC Is Used
Commissioning & Setup
The 40 mm adjustment screw lets technicians quickly dial in the exact stroke end position during initial machine setup without fabricating custom stops, accelerating commissioning time for packaging or assembly stations.
Product Changeover
On a multi-product conveyor diverter, the adjustable stroke allows operators to re-set the pusher's end position for different box widths in minutes, using the sensor-ready magnet for end-of-stroke confirmation.
Wear Compensation
In clamping or pressing fixtures, the stroke can be incrementally extended over time to compensate for pad wear or material compression set, maintaining consistent clamp force without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-40STC the Right Cylinder?
Choose the SCJ50X100-40STC when you need a mid-range force actuator that can be fine-tuned on the machine. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N; if space is tight, the 40 mm bore offers 628 N. This adjustable-stroke model is the right pick over a fixed-stroke SC when the end position must be dialled in precisely without swapping cylinders.
For replacement, match this exact configuration: 50 mm bore, 100 mm nominal stroke, a 40 mm adjustment range, PT port thread, centre trunnion mounting (F-SC50TC), and the built-in magnet. Since the nominal stroke is 100 mm, rod buckling is not a primary concern under axial loads, but ensure the load is guided if significant side forces are present.
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 SCJ50X100-40STC FAQ
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. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 2000 N (200 kgf).
Yes, provided the bore, port thread, and mounting match. The SCJ50X100-40STC has a 100 mm nominal stroke that can be shortened by up to 40 mm via the rear screw. It is physically slightly longer than a fixed 100 mm stroke SC to house the adjustment mechanism, so verify the available space in your machine.
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