Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50
The AirTAC JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 is a genuine double acting, double rod, adjustable stroke JIS-standard air cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM18×1.5
- CushionAdjustable, 29 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50
The hard-anodized aluminum barrel leaves out external rods, making the body noticeably shorter than an ISO 15552 cylinder of the same bore. A G3/8 port feeds the chamber, while a 29 mm adjustable air cushion decelerates the piston at both ends.
The -50 code means an external adjuster can shorten the extend stroke by up to 50 mm on site, giving a usable forward travel of 75 to 125 mm without swapping the actuator. This on-site tuning is perfect for dialing in end positions, and it lets you standardize one spare across multiple stroke variants. Note that this plain SKU lacks a magnet and cannot take a CMSE or DMSE sensor.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 Technical Specifications
| Model | Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | G3/8 |
| Rod thread | M18×1.5 |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1402 N | 1402 N |
| 0.7 MPa | 1962 N | 1962 N |
| Max (@1.0 MPa) | 286 kgf | |
JSIJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative).
Model Code: Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 Is Used
Stroke Tuning for Clamping
Dial in the exact clamping contact point on varying part widths by shortening the extend stroke up to 50 mm without changing the cylinder mount.
Adjustable Transfer Stop
Act as a raised transfer stop on a conveyor line, using the external adjuster to set the stop position precisely between 75 and 125 mm.
Shared Spare Inventory
Keep one actuator in maintenance stock and adjust the forward travel on site to replace cylinders across multiple slightly shorter stroke machines.
Is the Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 the Right Cylinder?
The adjustable stroke shines when you need to fine-tune the extend end position on the machine or want a single shared spare for slightly different travel needs. Mounting options include Basic, FA, LB, TC, TCM1, and TCM2 brackets. Because this is a non-magnetized SKU, you cannot attach position sensors; choose an -S variant if you require CMSE or DMSE switches. For any stroke at or above 300 mm, always use a guide rail to prevent side-load damage to the rod.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSIJ63~80 Adjustable Cylinder JSIJ63X125-50 FAQ
At 0.7 MPa the push is 2182 N and the pull is 1962 N. The theoretical maximum force is 318 kgf at 1.0 MPa. It uses a G3/8 port, a 20 mm rod with an M18x1.5 thread, and adjustable air cushions with a 29 mm stroke at each end.
The nominal stroke is 125 mm, which is the maximum forward travel. The external adjuster lets you shorten the extend stroke on site by up to 50 mm, giving a usable range of 75 to 125 mm. The retract end remains fixed. This mechanism only sets the end position and does not lock the load; you need an external rod lock or pilot-operated check valve to hold a load against air loss.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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