Airtac SCJ50 Standard Cylinder SCJ50X150-75
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X150-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke150 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X150-75
The SCJ50X150-75 delivers a nominal 150 mm stroke with a 75 mm rear-cap adjusting screw, letting you fine-tune the stroke end on the machine without swapping the cylinder. This 50 mm bore single-rod unit produces 982 N of push force at 0.5 MPa and 1767 N at the 0.9 MPa maximum operating pressure, making it a strong mid-range actuator for positioning tasks.
The 20 mm diameter piston rod and 21 mm air cushion provide reliable deceleration, while the PT1/4 port and M16x1.5 rod thread keep connections standard. The SCJ body length A is 194 mm, slightly longer than the fixed-stroke SC of the same bore to accommodate the adjusting mechanism. This model ships with TPU seals and PT threads as standard.
Airtac SCJ50 Standard Cylinder SCJ50X150-75 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X150-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 75 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 SCJ50X150-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -75 | 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 SCJ50X150-75 Is Used
Commissioning & Setup
Technicians adjust the 75 mm screw to precisely set the end-of-stroke position during machine commissioning, eliminating the need for external hard stops.
Format Changeovers
On packaging lines, the stroke end is quickly reset via the rear screw to accommodate different box or product sizes without mechanical rework.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke takes up pad or tooling wear over time, maintaining consistent contact force without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X150-75 the Right Cylinder?
Step up to the 63 mm bore if your application needs more than 982 N push at 0.5 MPa—the SCJ63 offers 1559 N. For lighter, faster moves, the 40 mm bore delivers 628 N. The SCJ is the right choice when you need to dial in the stroke end during commissioning or after tooling changes; if your stroke is permanently fixed, the standard SC cylinder is a simpler, lower-cost alternative. This SCJ50X150-75 replaces any AirTAC SCJ50 of the same nominal stroke and 75 mm adjust range with PT ports and basic mounting.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ 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 SCJ50X150-75 FAQ
At 0.5 MPa, push force is 982 N and pull force is 825 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
A screw in the rear cap lets you shorten the stroke end by up to 75 mm from the nominal 150 mm maximum. You turn the screw to set the desired stop position—it adjusts the stroke length, not the force or speed. The cylinder still requires a directional valve for motion control.
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