Airtac SCJ50 Standard Cylinder SCJ50X350-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-40S 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke350 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X350-40S
The SCJ50X350-40S delivers a field-tunable stroke end with a 40 mm rear-cap adjusting screw, letting you fine-tune the 350 mm nominal stroke without changing the cylinder. Its 50 mm bore and 20 mm piston rod generate 982 N of push force at 0.5 MPa, scaling to 1767 N at the maximum operating pressure of 0.9 MPa.
A body length of 194 mm (A dimension) and a 21 mm air cushion provide a compact, decelerated stop. The built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing, ideal for automated commissioning and format changeovers.
Airtac SCJ50 Standard Cylinder SCJ50X350-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 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 SCJ50X350-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SCJ50X350-40S Is Used
Commissioning Fine-Tuning
Adjust the 40 mm stroke-end screw during initial machine setup to dial in the exact stop position without swapping cylinders or machining external hard stops.
Format Changeovers
Quickly adapt the cylinder stroke for different product sizes on a packaging line, reducing downtime between batches with a simple screw adjustment.
Wear Compensation
Take up mechanical play or tooling wear over time by incrementally advancing the stroke end, maintaining consistent part contact and process quality.
Is the Airtac SCJ50 Standard Cylinder SCJ50X350-40S the Right Cylinder?
Step up to the 63 mm bore SCJ for 1559 N of push at 0.5 MPa if your load exceeds this model's 982 N. For fixed-stroke applications where field adjustment is unnecessary, the standard SC50X350 is a direct alternative. This SCJ50X350-40S is a direct replacement for any AirTAC SCJ with a 50 mm bore, 350 mm nominal stroke, 40 mm adjust range, PT ports, and a magnet. At 350 mm of stroke, ensure the rod is supported against side loads; consider an external guide or a guided cylinder if bending moments 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 SCJ50X350-40S FAQ
At the maximum operating pressure of 0.9 MPa, this cylinder provides 1767 N of push force. The pull force is lower at 1485 N due to the area of the 20 mm piston rod.
A rear-cap screw sets the stroke end position within a 40 mm range, shortening the 350 mm nominal stroke. It replaces any AirTAC SCJ with the same bore, nominal stroke, adjust range, and magnet option, but cannot be swapped with a fixed-stroke SC cylinder.
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