Airtac SCJ50 Standard Cylinder SCJ50X50-30LB
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30LB is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-30LB
The SCJ50X50-30LB is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you up to 30 mm of fine-tuning range via the rear-cap screw. In this 50 mm bore class, it delivers 982 N of push force at 0.5 MPa and 1767 N at 0.9 MPa, making it a strong mid-range actuator for positioning tasks that need frequent tweaking.
This model is fitted with an LB foot-mounting bracket (F-SC50LB) for stable surface mounting and uses the standard PT1/4 port with an M16x1.5 rod thread. The body length A(SCJ) is 194 mm, and the adjustable air cushion decelerates the 20 mm rod smoothly. It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile unit.
Airtac SCJ50 Standard Cylinder SCJ50X50-30LB Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30LB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 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 SCJ50X50-30LB
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X50-30LB Is Used
Commissioning & Setup
The 30 mm rear screw adjustment lets technicians dial in the exact stroke end-stop on a new machine without swapping cylinders or machining hard stops, speeding up line commissioning.
Format Changeover
On a packaging line, quickly adjust the stroke to handle a new box size. The 50 mm bore provides ample force for pusher arms, while the foot mount keeps the cylinder rigidly fixed.
Wear Compensation
In clamping or pressing fixtures, use the adjustable stroke to take up slack as tooling or pads wear over time, maintaining consistent contact force without reprogramming the PLC.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30LB the Right Cylinder?
Choose this 50 mm bore when the 40 mm unit's 628 N push force is marginal and you need the step up to 982 N without going to the larger 63 mm frame. The 30 mm adjust range is ideal for commissioning trials where the final end position is not yet fixed. If your stroke is fixed and never changes, the standard SC50X50 is a simpler, cost-effective alternative.
For replacement, match to another AirTAC SCJ adjustable-stroke cylinder with a 50 mm bore, 50 mm nominal stroke, -30 adjust range, PT thread, and LB foot mount. This model does not include a magnet; order the -S variant if you need sensor feedback. For strokes of 300 mm or longer, consider an external guide to protect the rod from side loads.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X50-30LB FAQ
At 0.5 MPa, it produces 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the 30 mm stroke-end adjustability. The SCJ50X50-30LB shares the same bore, rod, and port dimensions as the SC50, but the body is slightly longer to house the adjusting screw. Ensure the LB foot-mounting bracket and PT1/4 ports match your existing setup.
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 SCJ50X50-30LB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.