Airtac SCJ40 Standard Cylinder SCJ40X50-10S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X50-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke50 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X50-10S
The SCJ40X50-10S is a double-acting, single-rod pneumatic cylinder with a 40 mm bore and 50 mm nominal stroke, featuring a rear-cap adjusting screw that provides a 10 mm field-adjustable range for the stroke end. This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable, non-contact piston position detection. The 16 mm diameter piston rod and PT1/4 port deliver a push force of 628 N at 0.5 MPa, making it a capable actuator for light-to-medium automation tasks.
With a body length A(SCJ) of 185 mm and a 21 mm air cushion, this cylinder provides smooth, controlled deceleration at the stroke end. The adjustable stroke feature is ideal for commissioning fine-tuning, accommodating part tolerance variations, or setting precise end positions without external hard stops. This genuine AirTAC unit uses a TPU seal for standard temperature operation from -20 to +70 °C.
Airtac SCJ40 Standard Cylinder SCJ40X50-10S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X50-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X50-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ40 Standard Cylinder SCJ40X50-10S Is Used
Commissioning & Setup
The 10 mm stroke-end adjustment lets technicians quickly dial in the exact stopping position during machine commissioning, eliminating the need to fabricate shims or reposition external stops.
Packaging Machine Stops
Used as a product gate or stop on a conveyor, the adjustable stroke allows operators to fine-tune the gate position for different box sizes without changing the cylinder.
Clamping & Fixturing
In a welding or assembly fixture, the SCJ40X50-10S can be adjusted to compensate for part wear or slight variations in component dimensions, maintaining consistent clamping pressure.
Is the Airtac SCJ40 Standard Cylinder SCJ40X50-10S the Right Cylinder?
This 40 mm bore model, producing 628 N of push force at 0.5 MPa, is a step up from the 32 mm bore SCJ (402 N push) for applications needing more force without a large increase in size. If your load requires less force, the smaller 32 mm bore is a lighter and more compact alternative. For applications where the stroke length is fixed and will never need field adjustment, the standard SC cylinder offers the same force output in a slightly shorter body length.
A direct replacement must match the 40 mm bore, 50 mm nominal stroke, 10 mm adjustable range, PT port thread, and the -S magnet option. This cylinder uses the basic mounting style; for a pivoting application, consider the TC centre trunnion mount with the F-SC40TC kit. If the cylinder will be subjected to significant side loads, an external guide rail or a guided cylinder is recommended to prevent premature rod bearing wear and ensure long service life.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ40 Standard Cylinder SCJ40X50-10S FAQ
A screw mechanism in the rear cap allows you to shorten the stroke end by up to 10 mm. The nominal 50 mm stroke is the maximum; you can field-adjust it to any position between 40 mm and 50 mm to fine-tune the piston's stopping point.
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at the 0.9 MPa operating limit is 1130 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area.
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