Airtac SCJ100 Standard Cylinder SCJ100X450-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X450-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø100mm bore, 450mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke450 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X450-20S
The SCJ100X450-20S delivers a substantial 3927 N of push force at 0.5 MPa, making it a workhorse for heavy-duty clamping and pressing tasks where the end position needs field tuning. Its 25 mm piston rod and 29 mm air cushion length provide robust guidance and effective end-of-stroke deceleration for the 100 mm bore.
A rear-cap adjusting screw gives you 20 mm of stroke-end reduction, so you can dial in the exact stop point without swapping the cylinder or machining external hard stops. The built-in magnet (S suffix) lets you mount CMSG/DMSG/EMSG sensors directly on the tie-rod barrel for reliable, no-bracket position feedback.
Airtac SCJ100 Standard Cylinder SCJ100X450-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X450-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 20 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 SCJ100X450-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×450 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X450-20S Is Used
Format Changeover Stops
On packaging machines that handle multiple box sizes, the 20 mm screw adjustment lets operators quickly reset the push stroke for each format without tools, minimizing downtime.
Heavy Part Rejection
Use the 3927 N push force to eject off-spec parts from a high-speed conveyor. The adjustable stroke fine-tunes the pusher depth to prevent damage to the product or belt.
Clamp Stroke Take-Up
In a welding fixture, the screw compensates for electrode tip wear over thousands of cycles, maintaining consistent clamping pressure without reprogramming the machine.
Is the Airtac SCJ100 Standard Cylinder SCJ100X450-20S the Right Cylinder?
Step up to the SCJ125X450-20 if your application demands the 6136 N push force of a 125 mm bore, or drop to the SCJ80X450-20 (2513 N) for a lighter, more compact solution. This SCJ100 replaces any AirTAC SCJ100 with a 450 mm nominal stroke, 20 mm adjust range, PT ports, basic mount, and magnet.
At 450 mm of stroke, the extended rod is susceptible to side-load deflection. If your load is not perfectly guided, add an external linear guide or consider a guided cylinder to protect the rod bearings and seals from premature wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X450-20S FAQ
At 0.5 MPa, it produces 3927 N of push force and 3681 N of pull force. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke. Maximum push at 0.9 MPa is 7068 N.
Yes, it is a direct dimensional replacement for an SC100X450 with the same mounting and port configuration, but it adds the rear adjusting screw. Ensure you have clearance for the slightly longer body length A(SCJ) of 245 mm.
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