Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X20-10S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X20-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 20mm 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.
- BoreØ40 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MACJ40X20-10S
Short travel, full bore 40 muscle: 628.3 N push and 527.8 N pull at 0.5 MPa delivered inside a 20 mm stroke. The extend stroke is trimmed on site within the 10 mm window by an external stop screw, and variable air cushions at both ends let you cycle tiny moves at up to 800 mm/s without hammering the covers.
Like every MACJ, it wears a riveted stainless round barrel with a hard-chrome plated 16 mm rod and ships with the magnet already fitted for CMSG, DMSG or EMSG switches. It runs on 0.15-1.0 MPa (22-145 psi) of 40 um filtered air. For sizing math, treat about 377 N as the usable push at 0.5 MPa - roughly a 38 kg vertical lift, or 32 kg once you apply a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X20-10S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X20-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MACJ40X20-10S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -10 | 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 MACJ40X20-10S Is Used
CNC fixture clamp
Clamps a machined blank in a milling vise fixture; 628 N at 0.5 MPa holds the part while the 10 mm window sets exact clamp travel.
Reject kicker at a vision station
Flicks out-of-spec parts off a sorting conveyor with a fast 20 mm jab, cushioned so the kicker arm does not rattle loose.
Date-code stamp press
Drives a rubber date stamp onto carton blanks on a packaging line, the stainless barrel standing up to ink mist and frequent wipe-downs.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X20-10S the Right Cylinder?
Bore sizing runs either side of 40 mm: 32 mm yields 402.2 N push at 0.5 MPa, 50 mm yields 981.3 N. For a 20 mm move the short body keeps pitch tight on compact fixtures, and 1/8" ports suit the small valves typically used on quick cycles. Bear in mind the adjuster limits extend travel only and never holds position - if air drops the rod can be pushed back, so interpose a blocking valve where a clamp must stay closed. Mount with the FA flange or LB foot; I and Y knuckles adapt the rod end. If fixed travel is fine, the cushioned MAC does the same job without the trim window.
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 MACJ40X20-10S FAQ
Yes: 628.3 N push and 527.8 N pull at 0.5 MPa; 879.6 N push and 738.9 N pull at 0.7 MPa; theoretical maximum 128.1 kgf at 1.0 MPa. Pressure window is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, and extend travel trims within the 10 mm window.
Start with the cushion needles barely open, then close them until end-of-stroke bounce disappears at your cycle speed; the variable air cushion at both ends works down to short travels like this 20 mm stroke, letting heavier loads stop gently without bolt-on shock pads.
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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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