Airtac SCJ50 Standard Cylinder SCJ50X500-75S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-75S 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke500 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-75S
The AirTAC SCJ50X500-75S is a double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke-end reduction, enabling precise fine-tuning without cylinder replacement. With a 50 mm bore and 20 mm rod, it delivers a substantial push force of 1374 N at 0.7 MPa (1767 N at the 0.9 MPa maximum operating pressure), making it a strong performer for mid-range automation tasks.
This model includes a built-in magnet (-S suffix) for direct mounting of CMSG/DMSG/EMSG sensors, simplifying position feedback. The body length A(SCJ) is 194 mm, and the 21 mm air cushion decelerates the piston quietly. Operating on filtered air from 0.15 to 1.0 MPa, it handles speeds of 30-800 mm/s and temperatures from -20 to +70 °C with its standard TPU seals.
Airtac SCJ50 Standard Cylinder SCJ50X500-75S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 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 SCJ50X500-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SCJ50X500-75S Is Used
Commissioning & Setup
The 75 mm adjustment range allows engineers to dial in the exact stroke end position during machine commissioning, accommodating build tolerances without needing to swap out the cylinder or add hard stops.
Product Format Changeover
On packaging lines, the adjustable stroke lets operators quickly reset the pusher stroke length for different box or product sizes, minimizing downtime between batches with a simple screw adjustment.
Wear Compensation
In clamping or pressing applications, the stroke-end screw can be advanced over time to compensate for tooling or pad wear, maintaining consistent clamping force and position without reprogramming.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-75S the Right Cylinder?
Select the SCJ50X500-75S when you need a 500 mm nominal stroke with the flexibility to shorten the end position by up to 75 mm for commissioning or format changes. If your force requirement is lower, stepping down to a 40 mm bore reduces push force to 879 N at 0.7 MPa; for higher demands, the 63 mm bore provides 2182 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a simpler alternative.
At this 500 mm stroke, be mindful of side loading which can bend the 20 mm rod; consider an external guide rail or switch to a guided cylinder if lateral forces are present. A direct replacement must match the 50 mm bore, 500 mm nominal stroke, 75 mm adjustment range, PT port thread, and the -S magnet option. Mounting accessories from the SCJ subset, such as the FA front flange (F-SC50FA) or LB foot mount, can be added.
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 SCJ50X500-75S FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (reduced due to the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N.
A standard SC cylinder has a fixed stroke and cannot provide the 75 mm field-adjustable range. A direct replacement must be another SCJ adjustable-stroke cylinder with the same 50 mm bore, 500 mm nominal stroke, 75 mm adjustment range, PT ports, and a built-in magnet.
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