Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S is a genuine double acting, adjustable stroke 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.
- BoreØ25 mm
- Stroke85 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM10×1.25
- CushionFixed anti-impact bumper pads
- 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S
Double-acting on both strokes, the MAJ25X85-30S carries a 30 mm adjustable window, so the 85 mm extend stroke can be shortened on the machine by a stop screw rather than reordered. Push force at 0.5 MPa is 245 N with 206 N on retract, inside a 0.15-1.0 MPa (22-145 psi) working band and a 30-800 mm/s speed envelope. The rolling-packed body - stainless barrel, aluminium covers, stainless block - stays slim where an extruded profile would not fit.
Two construction details earn their keep here: the 20 um hard-chrome plate on the carbon-steel rod survives coolant mist and light washdown, and fixed anti-impact pads decelerate the piston at each end of travel with no air cushion settings to tune. For duty planning, treat about 147 N as the practical working force at 0.5 MPa; vertically that corresponds to hoisting roughly 12 kg with a 2:1 margin off the 25 kg theoretical lift.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 85 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed anti-impact bumper pads |
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×85 | Stroke length in mm. |
| -30 | 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S Is Used
Glue-bead gate on a carton line
Opens a glue head over flaps, with the stainless round body tolerating adhesive overspray and wipe-down better than painted-steel minis.
Lid-lift on a vibratory tumbler
Raises the inspection lid of a small tumbler; 147 N of usable force at 0.5 MPa lifts an 8 kg steel lid with room to spare.
Tooling clamp in a CNC fixture
Clamps aluminium blanks for a second-operation mill, where the 30 mm window lets setters fine-tune clamping travel per part family.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S the Right Cylinder?
Choose bore 25 when 245 N at 0.5 MPa matches the load; bore 20 (157 N) suits lighter gates and bore 32 (402 N) heavier clamps. Because the adjuster is an extend-side end stop only, never rely on it to hold position - the rod moves if air pressure drops. Mount with an FA flange or LB foot, fit an I or Y knuckle for swinging loads, and snap a CMSG switch onto the barrel to read the trimmed position.
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 Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X85-30S FAQ
At 0.5 MPa: 245 N push, 206 N pull. At 0.7 MPa: 343 N push, 289 N pull. Maximum theoretical force reaches 50 kgf at 1.0 MPa. Supply 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s. Air connection is a 1/8 inch port; rod thread M10x1.25.
The barrel is stainless steel rolled into the aluminium covers, while the 10 mm rod is carbon steel hard-chrome plated to about 20 um. That pairing resists rust from coolant mist and light washdown, and the two-way piston seal keeps grease stored against the bore wall for longer seal life.
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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