Airtac SCJ50 Standard Cylinder SCJ50X50-40TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-40TC 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-40TC
The SCJ50X50-40TC is a double-acting, single-rod pneumatic cylinder that delivers 982 N of push force at 0.5 MPa, making it a solid mid-range actuator for industrial tasks. Its defining feature is a rear-cap adjusting screw that provides up to 40 mm of stroke-end adjustment, allowing technicians to fine-tune the piston stop position without removing the cylinder from the machine.
This model is built on a durable tie-rod construction with a 20 mm diameter piston rod and PT1/4 ports. The integrated centre trunnion mount (F-SC50TC, supplied with TCM1 bracket) allows the cylinder to pivot, absorbing misalignment in swinging applications. With a 21 mm air cushion and a body length of 194 mm, it handles speeds of 30-800 mm/s.
Airtac SCJ50 Standard Cylinder SCJ50X50-40TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-40TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 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 SCJ50X50-40TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SCJ50X50-40TC Is Used
Commissioning & Setup
The 40 mm adjustment range lets commissioning engineers dial in the exact stroke end position on a new machine during initial setup, eliminating the need to fabricate custom mechanical stops.
Product Changeover
On a packaging line, quickly adjust the stroke end to accommodate a new box size or product format without swapping the cylinder, reducing downtime between production runs.
Wear Compensation
In clamping or pressing fixtures, the adjustable screw can be advanced over time to compensate for tooling wear or material compression, maintaining consistent clamping force without replacing components.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-40TC the Right Cylinder?
Choose the SCJ50 bore for general automation where the 982 N push force at 0.5 MPa fits the load. If you need more force, step up to the SCJ63 bore, which provides 1559 N of push at the same pressure; for a lighter, more compact solution, the SCJ40 bore offers 628 N. This 50 mm nominal stroke model is a direct replacement for another AirTAC SCJ50X50-40TC with matching PT ports and centre trunnion mount.
If your application does not require field-adjustable stroke end positions, the fixed-stroke SC50X50 is a simpler, more cost-effective alternative. For applications with high side loads, consider adding an external guide rail to prevent rod bending, or switch to a guided cylinder assembly.
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 SCJ50X50-40TC FAQ
At the standard 0.5 MPa operating pressure, this cylinder generates 982 N of push force and 825 N of pull force. The push force is higher because the single piston rod reduces the effective piston area on the return stroke. The maximum theoretical push force at 1.0 MPa is 200 kgf.
Yes, if you need field-adjustable stroke. The SCJ50X50-40TC has the same bore, port size (PT1/4), and rod dimensions as an SC50, but the body is slightly longer to house the adjusting screw. Ensure your mounting arrangement can accommodate the 194 mm body length and the centre trunnion pivot point.
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