Airtac SCJ50 Standard Cylinder SCJ50X50-30SLB
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30SLB 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 SCJ50X50-30SLB
The SCJ50X50-30SLB is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop position by up to 30 mm without removing the cylinder from the machine. With a 50 mm bore, it delivers 982 N of push force at 0.5 MPa and 825 N on the pull stroke, driven by a 20 mm diameter piston rod through PT1/4 ports.
This model includes a built-in magnet (suffix -S) for direct mounting of CMSG/DMSG/EMSG sensors, and ships with an LB-style axial foot mount (F-SC50LB) for secure surface installation. The adjustable screw only sets the stroke end position—it does not alter force or speed—and the cylinder's air cushion decelerates the piston near the end of travel.
Airtac SCJ50 Standard Cylinder SCJ50X50-30SLB Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30SLB |
|---|---|
| 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 SCJ50X50-30SLB
| 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 SCJ50X50-30SLB Is Used
Commissioning Fine-Tuning
During initial machine setup, the 30 mm adjustment screw lets technicians precisely set the end stop for a gripper or pusher without iterative cylinder swaps, cutting commissioning time.
Wear Take-Up on Stops
On a packaging line, the adjustable stroke compensates for mechanical wear on a hard stop over time, maintaining accurate placement of cartons without replacing the actuator.
Format Changeover
Quickly adapt a clamping or pressing station to a new product size by adjusting the stroke end by up to 30 mm, eliminating the need to stock multiple fixed-stroke cylinders.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30SLB the Right Cylinder?
Choose the SCJ50X50-30SLB when you need to dial in a precise stroke end during commissioning or format changes on a 50 mm bore platform. If your force requirement drops, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for heavier loads, the 63 mm bore provides 1559 N. The adjustable stroke makes this cylinder ideal for applications where swapping fixed-stroke cylinders would cause excessive downtime.
For replacement, match the bore, 50 mm nominal stroke, 30 mm adjustment range, PT port thread, LB foot mount, and magnet option exactly. If your application involves significant side loading or a stroke exceeding 300 mm, consider adding an external guide rail or switching to a guided cylinder to protect the rod bearing from bending moments.
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 SCJ50X50-30SLB FAQ
At the standard operating pressure of 0.5 MPa, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The adjustable stroke screw does not change these force values.
You can replace an SC50X50 with this SCJ50X50-30SLB if you need the 30 mm adjustable stroke feature and the LB foot mount. Ensure the port thread (PT), magnet option (S), and mounting style match your existing setup. The SCJ body is slightly longer than the fixed-stroke SC to accommodate the adjusting mechanism.
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