Airtac SCJ50 Standard Cylinder SCJ50X350-50S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-50S 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. Ø50mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke350 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X350-50S
The SCJ50X350-50S is a double-acting, single-rod pneumatic cylinder with a 50 mm rear-end stroke adjustment screw, allowing the effective stroke to be field-tuned from 300 mm up to the nominal 350 mm. This 50 mm bore model delivers 982 N of push force at 0.5 MPa and up to 1767 N at 0.9 MPa, using a 20 mm diameter piston rod and PT1/4 ports.
A built-in magnet (-S suffix) lets you clamp CMSG/DMSG/EMSG sensors directly to the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback without extra brackets. The adjustable cushioning decelerates the piston smoothly, and the body length A(SCJ) is 194 mm, making it a compact solution for applications where the stroke end position must be fine-tuned during commissioning or after mechanical wear.
Airtac SCJ50 Standard Cylinder SCJ50X350-50S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 50 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 SCJ50X350-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SCJ50 Standard Cylinder SCJ50X350-50S Is Used
Commissioning & Setup
Fine-tune the stroke end position during machine commissioning without removing the cylinder, saving hours of mechanical rework on packaging or assembly lines.
Wear Compensation
Adjust the stroke to compensate for gradual wear on gripper pads or tooling tips in material handling systems, maintaining consistent part contact.
Format Changeovers
Quickly adapt the cylinder's stroke for different product sizes in labelling or filling machines by turning the rear adjusting screw, eliminating the need for multiple fixed-stroke cylinders.
Is the Airtac SCJ50 Standard Cylinder SCJ50X350-50S the Right Cylinder?
Choose the SCJ50X350-50S when you need to dial in a precise stroke end point within a 50 mm window without swapping the cylinder. If your force requirement is lower, the SCJ40 series provides 628 N of push at 0.5 MPa; for higher force, the SCJ63 series steps up to 1559 N. This adjustable-stroke model is ideal for format changeovers, but if your application demands a fixed, repeatable stroke with no adjustment, a standard SC fixed-stroke cylinder is a simpler, more cost-effective choice. For strokes of 300 mm or more, be mindful of side-loading on the 20 mm rod; use an external guide rail or switch to a guided cylinder if the load is not perfectly axial. A direct replacement must match the 50 mm bore, 350 mm nominal stroke, 50 mm adjustment range, PT ports, and the -S magnet option.
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 SCJ50 Standard Cylinder SCJ50X350-50S FAQ
The push force is 982 N at 0.5 MPa and 1767 N at 0.9 MPa. The pull force is lower due to the single rod's area, providing 825 N at 0.5 MPa. The 50 mm adjustment screw does not alter the cylinder's force output.
A rear-cap screw mechanically limits the piston's stroke end within a 50 mm range, shortening the nominal 350 mm stroke. Use this SCJ model when you need to fine-tune the end position on the machine, such as for setup or format changes. Choose a fixed-stroke SC if the stroke length is permanent and never needs field adjustment.
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