Airtac SCJ100 Standard Cylinder SCJ100X800-50
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X800-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø100mm bore, 800mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke800 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X800-50
The SCJ100X800-50 is a double-acting, single-rod pneumatic cylinder that puts a 50 mm field-adjustable stroke range at your fingertips. With a 100 mm bore, it delivers 5497 N of push force at 0.7 MPa, making it a strong candidate for heavy-duty positioning tasks. The rear-cap adjusting screw lets you dial in the exact stroke end point—anywhere from 750 mm to the full 800 mm nominal stroke—without removing the cylinder or adding external hard stops.
This model uses a 25 mm diameter piston rod with an M20x1.5 rod thread and PT1/2 ports. Its 29 mm air cushion decelerates the piston smoothly, protecting end-cap components. The body length A(SCJ) is 245 mm, slightly longer than a fixed-stroke SC100 to house the adjustment mechanism. Operating pressure ranges from 0.15 to 1.0 MPa, with a maximum push force of 7068 N at 0.9 MPa.
Airtac SCJ100 Standard Cylinder SCJ100X800-50 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X800-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 800 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X800-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×800 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ100 Standard Cylinder SCJ100X800-50 Is Used
Multi-Product Palletizing
A palletizing cell handling boxes of varying heights uses the 50 mm adjustment range to set the final layer's push-off position. Operators can fine-tune the stroke end via the rear screw in seconds during a product changeover, eliminating the need for mechanical stop rework.
Clamping & Fixturing
In a welding fixture for large steel frames, the cylinder clamps parts of slightly different thicknesses. The adjustable stroke end compensates for part tolerance stack-up and electrode wear, ensuring consistent clamping force without over-stroking and damaging the workpiece.
Heavy-Duty Diverter Gate
A conveyor diverter uses this cylinder to push a 100 kg package onto a spur line. The commissioning team adjusts the stroke end to perfectly align the pusher plate with the roller plane, accounting for installation variances and ensuring smooth package transfer without hang-ups.
Is the Airtac SCJ100 Standard Cylinder SCJ100X800-50 the Right Cylinder?
Step up to a 125 mm bore (SCJ125) if your application demands more than the 5497 N push force this 100 mm bore provides at 0.7 MPa, as the SCJ125 delivers 8590 N at the same pressure. For a simpler, lower-cost setup where the stroke never changes, a fixed-stroke SC100 cylinder is the better choice. This SCJ100X800-50 is a direct replacement for any AirTAC SCJ100 with an 800 mm nominal stroke and a 50 mm adjustment range, matching PT port threads, basic mounting, and no magnet.
Because this cylinder has an 800 mm stroke, consider the potential for side loading and rod buckling. For applications where the rod must support a transverse load or guide a platen over this long extension, pair the cylinder with an external linear guide rail or switch to a guided cylinder assembly to ensure long seal life and prevent rod bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ100 Standard Cylinder SCJ100X800-50 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (reduced by the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N. The pull force is always lower because this is a single-rod cylinder.
You must match the adjustment range exactly for a drop-in replacement. This model has a 50 mm adjustment range (-50 suffix), meaning the screw can shorten the 800 mm nominal stroke down to 750 mm. A cylinder with a -20 or -30 suffix has a different screw and internal stop length, which will change the minimum and maximum stroke positions.
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