Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MACJ20X80-20S
Twenty millimetres of trim makes set-up forgiving: the MACJ20X80-20S runs an 80 mm extend stroke that the stop screw can shorten anywhere within a 20 mm window, and both ends carry a variable air cushion to soak up end-of-stroke shock. Double-acting output at 0.5 MPa is 157 N push and 131.9 N pull, climbing to 219.8 N and 184.7 N at 0.7 MPa. Supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
Build quality is the reason buyers stay with this series: a rolled stainless round barrel, aluminium covers and a hard-chrome plated rod that resists scoring in wet or dusty cells. Because the magnet is standard, CMSG / DMSG / EMSG switches bolt on for repeatability checks. In practice expect about 94 N of usable push at 0.5 MPa - roughly 16 kgf of lift potential, or a comfortable 8 kg vertical load at half margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MACJ20X80-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -20 | 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 MACJ20X80-20S Is Used
Case diverter on a warehouse conveyor
A 20 mm trim window lets the diverter paddle be fine-tuned to case widths, while the cushioned stops keep 219.8 N push cycles quiet at 0.7 MPa.
Lubricant-fill nozzle docking
Docking a fill nozzle into 25 L drums needs repeatable approach; about 94 N of working force secures the nozzle and the magnet drives a DMSG switch for in-position signals.
Timber clamp slide on a moulding line
The stainless barrel and chrome rod shrug off resin and dust on moulding machines; trimming the stroke 20 mm stops the clamp base from over-travelling into the jig.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X80-20S the Right Cylinder?
Compared with the -10S variant this model doubles the adjustment range to 20 mm, which suits fixtures whose stroke is tuned during commissioning. If 157 N at 0.5 MPa feels marginal, the bore 25 MACJ25X100-20 reaches 245.3 N; if space is tighter, bore 16 gives 100.5 N. Mount via FA flange or LB foot, add I or Y knuckles for swivel joints, and remember the trim screw is an extend-stroke stop only - it never holds a load against air loss.
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 MACJ20X80-20S FAQ
Bore 20 figures: 157 N push and 131.9 N pull at 0.5 MPa; 219.8 N push and 184.7 N pull at 0.7 MPa; 32 kgf theoretical maximum at 1.0 MPa. Keep real working loads near 94 N for long service life, within a 0.15-1.0 MPa (22-145 psi) supply.
The barrel is a stainless tube rolled onto aluminium covers with a stainless block, giving a riveted one-piece feel that tolerates washdown and humidity better than painted minis. The 8 mm rod is hard-chrome plated 20 um, and the two-way piston seal stores grease for long, dry-running intervals.
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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