Airtac SCJ40 Standard Cylinder SCJ40X50-50SH
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X50-50SH is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 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-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X50-50SH
The SCJ40X50-50SH is a 40 mm bore double-acting single-rod cylinder with a 50 mm nominal stroke and a generous 50 mm rear-end adjustment range, letting you fine-tune the stroke end without swapping the cylinder. Its 16 mm diameter rod and PT1/4 port supply 628 N of push force at 0.5 MPa, making it a capable mid-range actuator for hot environments.
This model is built with Viton (FKM) seals, extending the operating temperature range to 0–150 °C, and includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. The adjustable cushion decelerates the piston smoothly, and the body length A(SCJ) is 185 mm, providing a compact footprint for precise positioning tasks.
Airtac SCJ40 Standard Cylinder SCJ40X50-50SH Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X50-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 50 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 SCJ40X50-50SH
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ40X50-50SH Is Used
Hot Press End-Stop Tuning
The 50 mm adjustment screw allows operators to quickly recalibrate the pressing depth on heated platens without disassembling the tooling, compensating for thermal expansion.
Conveyor Diverter Setup
During packaging line changeovers, the adjustable stroke lets technicians fine-tune the diverter gate's travel to match different box widths, with sensor confirmation via the built-in magnet.
Oven Door Actuator Adjustment
The Viton seals withstand 150°C, and the adjustable stroke allows for perfect alignment of an oven door's closed position as gaskets wear in, maintaining a tight seal.
Is the Airtac SCJ40 Standard Cylinder SCJ40X50-50SH the Right Cylinder?
Choose the SCJ40X50-50SH when you need to dial in a specific stroke end point under high-temperature conditions. If 628 N of push force at 0.5 MPa is insufficient, stepping up to the 50 mm bore SCJ50 series provides 982 N of push force. For applications that do not require field adjustability, a fixed-stroke SC40 cylinder is a simpler alternative.
As a direct replacement, match the 40 mm bore, 50 mm nominal stroke, 50 mm adjustment range, PT port thread, and the -S magnet option. This cylinder uses a basic mount; if you need a pivoting motion, consider the TC centre trunnion kit (F-SC40TC).
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ40X50-50SH FAQ
At the standard 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. The maximum push force at 0.9 MPa is 1130 N.
Yes, if you need field adjustability. Ensure the replacement matches the 40 mm bore, 50 mm nominal stroke, PT ports, and magnet option. The SCJ body is slightly longer to house the adjusting screw, so verify the available space.
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