Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X85-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X85-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 85mm 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.
- BoreØ25 mm
- Stroke85 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MACJ25X85-40S
Machines that need one cylinder to cover several stroke settings fit the MACJ25X85-40S: its 40 mm window lets maintenance trim extend travel between 45 and 85 mm with an external screw, while the double-acting piston carries a variable air cushion at each end to kill stop shock. Force at 0.5 MPa is 245.3 N push and 206.1 N pull, on a 0.15-1.0 MPa (22-145 psi) supply at 30-800 mm/s.
For a buyer doing the lift math, 245.3 N at 0.5 MPa equals about 25 kg of theoretical vertical lift - halve it and this cylinder still raises roughly 12 kg with margin. The riveted stainless barrel and 20 um chrome-plated rod shrug off splash and mild corrosion, an edge in food benches and outdoor panels where painted minis pit.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X85-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X85-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 85 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MACJ25X85-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×85 | 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 MACJ25X85-40S Is Used
Tray lane setter on a depot sorter
Switch lane width by turning the end screw: extend travel adjusts across a 40 mm window, with 343 N available at 0.7 MPa.
Dosing valve actuator at a bottling filler
Set fill-rod travel between 45 and 85 mm; the variable air cushion allows faster closing without hammering the valve seat.
Clamp fixture for aluminium drilling
Roughly 245 N of clamp force at 0.5 MPa holds stock on the drill table; the chrome-plated rod resists coolant mist day after day.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X85-40S the Right Cylinder?
Compare both directions: the 20 mm bore pushes 157 N at 0.5 MPa with M8x1.25 on an 8 mm rod, while the 32 mm bore pushes 402 N with M10x1.25 on a 12 mm rod; this 25 mm unit at 245 N is the efficient middle for clamping and pressing. Mount on the FA flange or LB foot; I and Y knuckles take pivot tooling. One caution: the stroke adjuster is a mechanical extend stop, never a load brake, so on air loss the piston can still move - add external locking where a suspended 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 MACJ25X85-40S FAQ
Push is 245.3 N and pull 206.1 N at 0.5 MPa; at 0.7 MPa push rises to 343.4 N. Theoretical maximum for the 25 mm bore is 50 kgf at 1.0 MPa. Rod thread is M10x1.25 on a 10 mm rod, ports are 1/8", stroke trims across a 40 mm window, and the variable air cushion works at both ends between 0.15-1.0 MPa (22-145 psi).
Yes in damp, food-side or outdoor panels: the stainless round barrel and the 20 um hard-chrome plated carbon-steel rod resist mild corrosion and repeated hose-downs that pit painted mini cylinders, while the riveted cover-to-tube joint keeps the seal intact. The built-in magnet ships standard, so CMSG, DMSG or EMSG position switches attach without options.
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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