Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ20 mm
- Stroke125 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S
With a 100 mm adjustment span on a 125 mm stroke, this bore 20 MACJ can be re-tuned for almost any shorter extend travel on site - no cylinder swap needed. It is double-acting with a variable air cushion at both ends, pushing 157 N and pulling 131.9 N at 0.5 MPa, and 219.8 N push at 0.7 MPa.
The cushioning is the quiet hero here: dial it in and you can push light loads at up to 800 mm/s without hammering the aluminium covers. Construction is a riveted stainless round barrel with a hard-chrome plated 8 mm rod, so corrosion in damp or washdown areas is a non-issue. Expect around 94 N of usable push at 0.5 MPa - equivalent to lifting about 8 kg vertically with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 300 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -100 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S Is Used
Benchtop filling head
Lifting a small dispensing nozzle between vials on a lab filler; the 100 mm window sets draw height per vial format without re-plumbing.
Tote labeling pusher
Feeding tote bins one at a time to a label applicator head; cushions tame the 800 mm/s return so labels land square.
Spooler tension arm
A light guide-wheel arm keeps tension on a wire spooler; the wide trim range tunes arm travel to different spool diameters.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S the Right Cylinder?
Bore 16 gives 100.5 N at 0.5 MPa if your load is lighter; bore 25 offers 245.3 N when it is not. This 20 mm unit splits the two with headroom. Do not treat the stop screw as a brake - with pressure removed the piston can creep, so a check or locking valve is needed to hold a suspended load. Position sensing is effectively free: the standard magnet pairs with CMSG, DMSG and EMSG switches. FA flange and LB foot mounts, plus I and Y rod knuckles, cover most fixturing; at 125 mm stroke keep the 8 mm rod side-load free or add external guides.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
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 On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X125-100S FAQ
Push is 157 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa push reaches 219.8 N with 184.7 N pull. Maximum theoretical force is 32 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s.
The barrel is a precision stainless tube rolled onto aluminium-alloy covers, and the 8 mm carbon-steel rod carries a 20 um hard-chrome plating - a combination that resists mild corrosion and routine washdown. Air connections are 1/8", and FA flange or LB foot mounts adapt it to most frames.
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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