Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X160-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X160-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 160mm 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.
- BoreØ20 mm
- Stroke160 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- 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 MACJ20X160-40S
End-of-stroke hammering is optional on the MACJ20X160-40S: the variable air cushion at both ends is dialed in per application, so you can run 30-800 mm/s or carry heavier payloads without pounding the aluminium covers. The cylinder is double-acting with an adjustable extend stroke - the external stop screw shortens travel anywhere inside the 40 mm ordered window.
At 0.5 MPa this bore 20 unit pushes 157 N and pulls 131.9 N. Plan on roughly 94 N of usable work (60 percent of the rating) and you will size a conveyor stop or part-ejection job with headroom to spare. The stainless round barrel resists corrosion in damp or rinsed-down areas, and the magnet built into every MA piston drops straight onto CMSG, DMSG or EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X160-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X160-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 160 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MACJ20X160-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×160 | 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 MACJ20X160-40S Is Used
Bottle indexing stop
A stop blade on a bottling conveyor that must re-appear after each bottle passes: 94 N of working push at 0.5 MPa indexes PET bottles easily, and the magnet trips a CMSG switch to confirm the blade is up.
Bearing seat press
Seating small bearings into housings on an electronics assembly bench, where the 40 mm window lets the operator dial the exact press depth and the dual cushion removes bounce at the bottom of the stroke.
Pallet presence check
A feeler on a warehouse pallet infeed that signals part presence through a DMSG switch - the standard magnet needs no option code, and stroke is re-trimmed within 40 mm for mixed pallet sizes.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X160-40S the Right Cylinder?
Compare both directions before committing: at 0.5 MPa the bore-20 MACJ20X160-40S pushes 157 N and pulls 131.9 N, so retract-side duties get less force - bore 16 (100.5 N push) suits lighter work while bore 25 (245.3 N) handles heavier clamps. A 160 mm stroke on an 8 mm rod is long enough that side loads should be carried by external guides, not the rod itself. Mount on an FA flange or LB foot and add I or Y knuckles as the linkage needs; the built-in magnet means position sensing needs no special piston. Note that the adjuster is a travel stop, not a brake - a suspended rod will drift if pressure fails.
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 MACJ20X160-40S FAQ
Push is 157 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa push is 219.8 N and pull 184.7 N, with a theoretical peak of 32.0 kgf at 1.0 MPa. Ports are 1/8", rod thread M8x1.25, bore 20 mm, rod 8 mm, speed 30-800 mm/s, operating pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi).
No. Every MA-series piston carries a built-in magnet as standard, so CMSG, DMSG and EMSG switches mount directly on the barrel and sense end of stroke with no special-order piston. Combined with the 40 mm adjustable window and dual air cushion, that makes mid-line re-targeting a wrench-and-switch job.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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