Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X300-100S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X300-100S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 MACJ40X300-100S
Three hundred millimetres of travel from a bore only 40 mm across: this MACJ pushes 628.3 N at 0.5 MPa (879.6 N at 0.7) and retracts with 527.8 N behind it. The stop screw trims the extend stroke by up to 100 mm on site, so one cylinder serves several fixture depths. At full output the rod hoists about 64 kg; keep a 2:1 margin and you can still lift around 32 kg vertically with confidence.
Both ends carry a variable air cushion, which matters on a 300 mm stroke where rod speed can reach 800 mm/s and end-of-travel energy builds fast. FA flange or LB foot mounts plus I and Y rod knuckles cover most frame builds. Supply is 0.15-1.0 MPa (22-145 psi) of air filtered to 40 um.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X300-100S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X300-100S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MACJ40X300-100S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MACJ40X300-100S Is Used
Carton pusher across a conveyor gap
628 N at 0.5 MPa shoves stacks of cartons across a 300 mm transfer gap at line speed.
Machine guard door lift
Rod raises a sliding polycarbonate guard of roughly 32 kg with a 2:1 margin still in hand.
Sliding table indexing
Long throw advances an indexing table between stations; the 100 mm window absorbs fixture variation.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X300-100S the Right Cylinder?
For this 300 mm travel, check side load first: a 16 mm rod spanning 300 mm bends easily, so guide the load externally or fit I or Y knuckles rather than cantilevering it off the rod. Need more force? A bore 50 unit pushes 981.3 N at 0.5 MPa; need less, the bore 32 gives 402.2 N. The adjuster is an end stop, not a load brake - on air loss the rod will sag, so fit a holding valve for suspended loads. Mount FA flange or LB foot; switches snap on thanks to the standard magnet.
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 MACJ40X300-100S FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; at 0.7 MPa expect 879.6 N push and 738.9 N pull, with a 128.1 kgf theoretical ceiling at 1.0 MPa. Supply 0.15-1.0 MPa (22-145 psi) of air filtered to 40 um, proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speeds 30-800 mm/s. Ports are 1/8" with an M12x1.25 male rod thread.
Over a long travel the rod is exposed through much of the cycle; the hard-chrome plated 16 mm carbon-steel rod and stainless barrel resist the coolant mist and humidity that pit painted mini cylinders, and the riveted round body keeps seals tight. The magnet is fitted as standard, so CMSG, DMSG or EMSG switches read end positions without special ordering.
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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