Airtac SCJ50 Standard Cylinder SCJ50X390-100S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X390-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 390mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke390 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X390-100S
The SCJ50X390-100S delivers up to 1767 N of push force at 0.9 MPa, making it a strong contender for mid-range automation tasks. Its 20 mm diameter piston rod and PT1/4 ports supply ample flow, while the 100 mm rear adjusting screw allows operators to fine-tune the stroke end position anywhere from 290 mm to the full 390 mm without swapping the cylinder.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The double-acting, single-rod design provides greater push force than pull, and the adjustable air cushion decelerates the piston smoothly at both ends, protecting the 194 mm body length from impact wear.
Airtac SCJ50 Standard Cylinder SCJ50X390-100S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X390-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 390 mm |
| Stroke adjustment | Up to 100 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 SCJ50X390-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×390 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ50X390-100S Is Used
Commissioning & Fine-Tuning
The 100 mm rear screw lets technicians dial in the exact stroke end during machine setup, eliminating the need to stock multiple fixed-stroke cylinders for trial runs.
Product Format Changeover
Quickly adjust the pusher stroke for different box or pallet sizes on a packaging line without mechanical rework, reducing downtime between batches.
Clamp Stroke Take-Up
Compensate for part tolerance or tooling wear in a clamping station by fine-tuning the cylinder's end position, maintaining consistent clamping force over time.
Is the Airtac SCJ50 Standard Cylinder SCJ50X390-100S the Right Cylinder?
With 1374 N of push force at 0.7 MPa, this SCJ50 suits many clamping, pressing, and feeding applications. If you need more force, stepping up to the SCJ63 bore provides 2182 N at the same pressure, while the SCJ40 bore offers a lighter 879 N for smaller fixtures. The 100 mm adjustment range is ideal for commissioning trials or format changeovers where the exact stroke length must be dialled in on the machine.
For a direct replacement, match the 50 mm bore, 390 mm nominal stroke, 100 mm adjust range, PT ports, and the -S magnet option. At this 390 mm stroke, consider an external guide rail or a guided cylinder if the rod will experience significant side loads, as long unsupported strokes can cause rod bending. If a fixed stroke is sufficient, the standard SC series is a simpler alternative.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ50X390-100S FAQ
The push force is 982 N at 0.5 MPa, 1374 N at 0.7 MPa, and reaches 1767 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 20 mm rod, delivering 825 N at 0.5 MPa.
No. The rear screw only sets the mechanical stroke end position; it does not act as a lock or brake. If the load must be held without air pressure, you must add an external rod lock, a mechanical brake, or a pilot-operated check valve to the circuit.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ50 Standard Cylinder SCJ50X390-100S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.