Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 35mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ20 mm
- Stroke35 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- 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 MFCJ Adjustable Mini Cylinder MFCJ20X35-30S
Tune both the extend end-point and end-of-stroke shock on-site with this double-acting, adjustable-stroke mini cylinder. The external adjuster shortens the extend stroke by up to 30 mm (usable 5-35 mm), while the needle-set variable air cushion at both ends soaks up high-speed kinetic energy for smooth, quiet operation.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, the body is deliberately shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. The 20 mm bore uses a 1/8" port and an Ø8 mm rod, delivering 157 N of push force at 0.5 MPa. Because this SKU includes the -S magnet, it is ready for CMSG, DMSG or EMSG position sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S Is Used
Light Part Pushing
Delivers 157 N of push force at 0.5 MPa to index small electronic components, with the 30 mm stroke adjuster letting you dial in the exact extend distance on the fly.
Package Diverting
Variable air cushions absorb the shock of high-speed 8 kg carton diverting operations, while the SUS304 stainless barrel handles mild washdown environments.
Trial Fit Stations
Ideal for prototyping and changeovers where the exact 5-35 mm extend position and end-of-stroke deceleration both need external tuning without changing the cylinder.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S the Right Cylinder?
When sizing this 20 mm bore against the next size up, compare the real thrust: this model pushes 157 N and pulls 131.9 N at 0.5 MPa, while the larger MFCJ25 pushes 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where exact positioning and shock absorption matter. For a safe working load, expect around 94 N (about 60% of the 0.5 MPa push force), which lifts roughly 8 kg vertically with a 2:1 margin.
The adjustable stroke and dual variable air cushions excel in trial-fit stations and shock-sensitive packaging tasks. Mount using LB foot, FA flange or TC trunnion brackets (no SDB or back-cover option here). Note that the cushion only decelerates the piston near stroke end—it is not a lock. If you need to hold a load vertically during air loss, add an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
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 Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X35-30S FAQ
This 20 mm bore cylinder features a 1/8" port and an Ø8 mm rod. It generates 157 N push / 131.9 N pull at 0.5 MPa, 219.8 N push / 184.7 N pull at 0.7 MPa, and a theoretical maximum of 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm, giving a usable extend range of 5-35 mm. The variable air cushion at both ends is needle-set to decelerate the piston smoothly at high speeds. This -S model includes a magnet for CMSG/DMSG/EMSG sensors, but the cushion is not a brake and will not hold a load on air loss.
Authorized Export Seller
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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