Airtac SCJ63 Standard Cylinder SCJ63X100-20SH
The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-20SH 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. Ø63mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Nominal stroke100 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ63 Standard Cylinder SCJ63X100-20SH
This SCJ63X100-20SH is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction, letting you fine-tune the 100 mm nominal stroke without swapping the unit. The 63 mm bore generates 1559 N of push force at 0.5 MPa, and the 20 mm rod with M16x1.5 male thread handles typical industrial loads. An integrated magnet (-S) allows direct mounting of CMSG/DMSG/EMSG sensors for position feedback, while the Viton (FKM) seal (-H) extends the operating temperature range to 0–150 °C, making it suitable for hot or aggressive environments.
Built on the proven AirTAC tie-rod platform, this cylinder uses a PT1/4 port and features a 28 mm adjustable air cushion for smooth deceleration. The body length A(SCJ) is 197 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism. This genuine AirTAC unit is a direct replacement for any SCJ63X100-20SH with the same bore, stroke, adjust range, magnet, and Viton seal.
Airtac SCJ63 Standard Cylinder SCJ63X100-20SH Technical Specifications
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-20SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 20 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, 28 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCJ63 Standard Cylinder SCJ63X100-20SH
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×100 | 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 SCJ63 Standard Cylinder SCJ63X100-20SH Is Used
Commissioning & Fine-Tuning
The 20 mm adjusting screw lets technicians dial in the exact stroke end position on a new machine during setup, compensating for assembly tolerances without needing to modify hard stops or brackets.
High-Temperature Format Changeover
In a hot packaging or forming line (up to 150°C), the Viton seal and adjustable stroke allow operators to quickly reset the cylinder’s end position for a new product format without cooling the machine or replacing seals.
Wear Compensation in Clamping
In a high-cycle clamping fixture, the stroke can be gradually extended via the rear screw to compensate for jaw or pad wear over time, maintaining consistent clamping force without immediate part replacement.
Is the Airtac SCJ63 Standard Cylinder SCJ63X100-20SH the Right Cylinder?
Choose the SCJ63 bore when you need a push force around 1559 N at 0.5 MPa—stepping down to a 50 mm bore drops force to 982 N, while moving up to an 80 mm bore increases it to 2513 N. This adjustable-stroke variant is the right pick when your application requires on-machine stroke-end tuning for commissioning, format changes, or wear compensation; if your stroke is fixed and never needs adjustment, the standard SC series offers a simpler, more compact alternative. For strokes of 300 mm or longer, evaluate the rod for potential side loading and consider adding an external guide rail or switching to a guided cylinder to prevent bending.
This model is a direct, form-fit replacement for an AirTAC SCJ63X100-20SH with PT thread, basic mounting, a magnet, and a Viton seal. When replacing, ensure the new cylinder matches the 20 mm adjustable range and the high-temperature seal specification to maintain process compatibility.
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 SCJ63 Standard Cylinder SCJ63X100-20SH FAQ
At the standard 0.5 MPa operating pressure, this 63 mm bore cylinder produces 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The adjustable stroke screw does not alter the cylinder's force output.
A rear-cap screw physically limits the piston's retraction, shortening the stroke end by up to 20 mm from the 100 mm nominal maximum. Use the SCJ when you need to fine-tune the stroke position on the machine for setup, changeovers, or wear take-up. Choose a fixed-stroke SC if your stroke length is a permanent, unchanging specification.
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