Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 175mm 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
- Stroke175 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 MACJ40X175-20S
Trim the extend stop by up to 20 mm on site: the ordered 175 mm stroke can be shortened anywhere within a 155-175 mm band using the external adjuster, with no shims or re-ordering. Air drives the piston both ways (double-acting) and a variable cushion at each end absorbs the shock of a 628 N piston arriving at up to 800 mm/s. At 0.5 MPa expect 628 N extend and 528 N retract; the bore tops out at a theoretical 128 kgf at 1.0 MPa.
Construction stays classic MA: a rolled stainless round barrel joined to aluminium covers, plus a 16 mm hard-chrome carbon-steel rod that copes with splash, humidity and outdoor dust far better than painted minis. The magnet is inside every piston as shipped, so CMSG / DMSG / EMSG reed or Hall sensors mount directly on the tube.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 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 MACJ40X175-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 MACJ40X175-20S Is Used
Case ejector on a shrink-wrap line
Kicks finished cases off the belt; 628 N at 0.5 MPa clears a jammed carton and the 20 mm window aligns the ejector face to the belt edge.
Lab press fixture
Applies repeatable clamp force in a small test press - about 377 N of usable work at 0.5 MPa, rising to 880 N if you run 0.7 MPa.
Powder hopper slide gate
Opens and closes a hopper outlet; the stainless tube and chrome rod stand up to dusty, humid conditions and the cushion damps gate slam.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X175-20S the Right Cylinder?
Choose this bore when loads sit between the 32 mm class (402 N push at 0.5 MPa) and the 50 mm class (981 N). Keep the working force near 377 N - about 60 percent of the 628 N rating - and the cylinder will ride through pressure spikes and seal wear without fuss; that figure also supports roughly 32 kg of vertical lift at a 2:1 margin. FA flange or LB foot mounting, with I and Y knuckles for lever linkages. Remember the 20 mm adjuster is an end stop only: with air off the rod is free to move, so add a separate holding device where the load must stay put.
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 MACJ40X175-20S FAQ
Push is 628 N and pull 528 N at 0.5 MPa; at 0.7 MPa push reaches 880 N and pull 739 N; theoretical maximum force is 128 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) air at 30-800 mm/s through a 1/8" port.
An external stop screw shortens the extend stroke anywhere within the 20 mm window - it cannot lengthen travel past the ordered 175 mm, and it acts as a stop rather than a brake, so the piston will drift if air is lost. The variable air cushion at both ends remains fully active at any trimmed position.
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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