Airtac SCJ50 Standard Cylinder SCJ50X90-30
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X90-30 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke90 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X90-30
The SCJ50X90-30 is a 50 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. A rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm, giving an effective working range of 60–90 mm without changing the cylinder body. This model delivers 982 N of push force and 825 N of pull force at 0.5 MPa, using a 20 mm diameter piston rod and PT1/4 ports.
Because the stroke is set by a mechanical screw, commissioning engineers can dial in the exact end position after installation, compensating for mounting tolerances or tooling wear. The SCJ50 body length is 194 mm plus stroke, and it includes an adjustable air cushion for smooth deceleration. It accepts the SCJ mounting subset: basic, FA front flange, LB foot, or TC centre trunnion with TCM1 bracket.
Airtac SCJ50 Standard Cylinder SCJ50X90-30 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X90-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 90 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 SCJ50X90-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×90 | 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 SCJ50X90-30 Is Used
End-Stop Commissioning
During machine setup, the 30 mm adjusting screw allows technicians to fine-tune the actuator's stop point for perfect alignment with tooling, eliminating the need for shims or custom stroke lengths.
Product Format Changeover
On packaging or sorting lines, operators can quickly adjust the cylinder stroke to handle different product sizes, reducing changeover time without swapping the cylinder or adding external hard stops.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke end can be periodically advanced to compensate for pad or jaw wear, maintaining consistent clamping force and part contact without replacing components.
Is the Airtac SCJ50 Standard Cylinder SCJ50X90-30 the Right Cylinder?
Choose the SCJ50X90-30 when you need a mid-range force cylinder with on-machine stroke tuning. If 982 N push at 0.5 MPa is marginal, stepping up to the 63 mm bore provides 1559 N push; if the force is excessive and a smaller profile is preferred, the 40 mm bore delivers 628 N push. For applications where the stroke is fixed and never adjusted, the standard SC50 series offers the same force and mounting in a simpler, lower-cost package.
For a direct replacement, match the 50 mm bore, 90 mm nominal stroke, 30 mm adjustable range, PT1/4 ports, and the specific mounting accessory (if any). This model is a basic cylinder without a magnet; if you need piston position sensing, order the SCJ50X90-30S variant with a built-in magnet for CMSG/DMSG sensors.
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 SCJ50X90-30 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (the difference is due to the single 20 mm rod reducing the piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 200 kgf.
Yes, if the mounting and port configuration match. The SCJ50X90-30 has the same 50 mm bore, PT1/4 ports, and mounting pattern as an SC50, but the body is slightly longer to accommodate the rear adjusting screw. Ensure the 30 mm adjustment range covers your stroke variation needs.
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