Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-10S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-10S 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 MACJ40X40-10S
A 40 mm bore in just 40 mm of stroke sounds small until you apply air: 628.3 N of push at 0.5 MPa, roughly 64 kgf of straight-line muscle. This MACJ is double-acting with an adjustable extend stroke - the stop screw trims travel within the ordered 10 mm window - and both ends carry a variable air cushion to soften each landing.
Construction is the classic MA mini recipe: a stainless-steel round barrel, hard-chrome plated rod and riveted aluminium covers that stand up to washdown and humid shops far better than painted minis. Halve the 64 kgf vertical equivalent and you can still lift about 32 kg with a 2:1 margin, plenty for jigs, clamps and short-stroke presses. The piston magnet is standard, ready for CMSG / DMSG / EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-10S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-10S |
|---|---|
| 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 MACJ40X40-10S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MACJ40X40-10S Is Used
Drill jig clamp for aluminium extrusions
Swinging clamps are slow; a MACJ on the jig face pushes the clamp foot onto 40x40 aluminium profile in one 40 mm move, with the 10 mm window dialing clamp travel to the extrusion tolerance.
Pressing D-sub shells into test fixtures
PCB test rigs need a firm, short press to seat D-sub connectors into the fixture; 628.3 N at 0.5 MPa seats them home and the cushion prevents bounce that would skew the contacts.
Embossing date codes on small brackets
A hand-fed stamping station marks batch codes on stainless brackets; the short stroke keeps cycle time low while the adjustable stop keeps mark depth identical across operators.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X40-10S the Right Cylinder?
Compare before you commit: the 32 mm MACJ develops 402.2 N push at 0.5 MPa and the 50 mm bore 981.3 N, so this 40 mm size is the middle option for mid-weight clamping. Pull at 0.5 MPa is 527.8 N, so retraction force is lower than extension. Keep in mind the 10 mm adjust screw only shortens the extend stroke; it is not a load-holding device and the rod will drift if supply pressure disappears. Mount with FA flange or LB foot, and add an I or Y knuckle to the 16 mm rod (M12x1.25 thread) for linkage work.
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 MACJ40X40-10S FAQ
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 maximum at 1.0 MPa. The bore is 40 mm with a 16 mm rod, 1/8" air ports and M12x1.25 male rod thread, working range 0.15-1.0 MPa (22-145 psi) and speed 30-800 mm/s.
The external stop screw limits how far the piston travels on extension, so you can trim the 40 mm stroke anywhere within 10 mm to match your fixture, then lock it. It shortens the stroke only; it never adds travel, and on lost air the piston is free to move, so treat it as a limit stop rather than a brake.
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Standard models are processed and dispatched in 3-5 business days.
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