Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MACJ40X40-40S
Fixtures change; the MACJ40X40-40S adapts. Its 40 mm extend stroke can be trimmed anywhere in the full 40 mm window from the external stop screw, while the 40 mm bore still produces 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. Double-acting by design, it cushions variably at both ends so each landing stays soft whatever the setting.
AirTAC builds the MA series as a riveted round body: stainless-steel barrel, 20 um hard-chrome plated rod, aluminium-alloy covers. That combination shrugs off washdown and outdoor splash that swells painted minis. On the sizing side, the theoretical 128.1 kgf at 1.0 MPa overstates daily reality - plan around 377 N of usable push at 0.5 MPa, which equates to lifting about 32 kg vertically with a 2:1 margin. CMSG / DMSG / EMSG switches drop straight on thanks to the standard piston magnet.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MACJ40X40-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -40 | 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 MACJ40X40-40S Is Used
Reconfigurable clamp set on a welding table
Job-shop welding tables change clamps daily; the full 40 mm window lets one cylinder model serve thick and thin fixtures alike without re-plumbing, and the stainless body tolerates grinding dust and wipe-down cleanup.
Vial pusher between analyzer stations
Lab automation shuttles sample vials a short hop from sampler to analyzer; a tray of glass vials sits far under the 377 N working force, and the cushions prevent glass-on-metal chatter at each station.
Sorting gate on a parts diverter
A pivoting gate flips small machined parts between a good-parts chute and a rework bin; CMSG switches confirm gate position every cycle so the sorter never drops a part into the wrong lane.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-40S the Right Cylinder?
Choose by force band: at 0.5 MPa the 32 mm MACJ gives 402.2 N and the 50 mm gives 981.3 N, so this 40 mm model covers the middle where most small clamps and pushers live. Retraction delivers 527.8 N. Remember the stop screw is a travel limit for extension, not a lock - an unsupported load still moves the piston if air bleeds off, so hold the load with a valve or mechanical latch. Mount via FA flange or LB foot; I and Y knuckles adapt the M12x1.25 rod thread to your linkage.
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 MACJ40X40-40S FAQ
Bore 40 mm, stroke 40 mm, adjustable within a 40 mm window. Forces: 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; 128.1 kgf theoretical at 1.0 MPa. Ports 1/8", rod 16 mm with M12x1.25 thread, speed 30-800 mm/s.
Generally yes - the MA series uses a stainless-steel barrel with a hard-chrome plated rod and riveted aluminium covers, a package chosen to resist the rust and swelling painted-steel minis show in washdown, food or outdoor duty. Seals run on 40 um filtered air across -20 to +70 C.
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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