Airtac SCJ50 Standard Cylinder SCJ50X350-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-50 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 SCJ50X350-50
The SCJ50X350-50 is a 50 mm bore double-acting, single-rod pneumatic cylinder with a 350 mm nominal stroke and a 50 mm rear adjustable range. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, with a maximum push of 1767 N at 0.9 MPa operating pressure. The integrated rear adjusting screw lets you shorten the stroke end by up to 50 mm without removing the cylinder, which is ideal for commissioning and fine-tuning end positions.
This tie-rod cylinder uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. It features an adjustable air cushion (21 mm length) for smooth deceleration and a body length of 194 mm. The SCJ design is single-rod, so push force is greater than pull force, and it is rated for standard strokes up to 1200 mm for this bore.
Airtac SCJ50 Standard Cylinder SCJ50X350-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-50 |
|---|---|
| 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 SCJ50X350-50
| 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 SCJ50X350-50 Is Used
Commissioning & Process Setup
The 50 mm adjustable stroke allows technicians to dial in the exact end position during initial machine setup, accommodating small assembly or tooling variations without changing the cylinder.
Format Changeover on Packaging Lines
Quickly adjust the stroke end to handle different box or carton sizes on a packaging machine. The 350 mm nominal stroke covers a wide range, while the 50 mm adjustment fine-tunes the stop for each format.
Wear Take-Up in Clamping Fixtures
In high-cycle clamping operations, use the rear screw to compensate for pad or workpiece wear over time, maintaining consistent clamping force without reprogramming or adding shims.
Is the Airtac SCJ50 Standard Cylinder SCJ50X350-50 the Right Cylinder?
Choose the SCJ50X350-50 when you need a 50 mm bore with a 350 mm nominal stroke and the ability to shorten the stroke end by up to 50 mm for process tuning. If more force is required, step up to the 63 mm bore SCJ63 series, which provides 1559 N of push at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC50 cylinder is a simpler alternative. This model is a direct replacement for another AirTAC SCJ50X350-50 with PT ports, basic mounting, and no magnet.
At a 350 mm stroke, be mindful of side loads that can cause rod bending. If the application involves off-axis forces, use an external guide rail or switch to a guided cylinder to protect the rod and bearing.
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 SCJ50X350-50 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. Because it is a single-rod cylinder, the push force (full bore area) is always higher than the pull force (bore area minus rod area).
Yes, if you need the adjustable stroke feature. The SCJ50X350-50 has the same bore, rod size, and port thread as an SC50, but the body is slightly longer to house the adjusting screw. Ensure your mounting and envelope can accommodate the extra length, and match the port type (PT), mounting style, and magnet option for a direct retrofit.
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