Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MACJ25X250-30S
A 30 mm setup window gives the MACJ25X250-30S room to re-time a machine without swapping cylinders: the 250 mm extend stroke adjusts anywhere between 220 and 250 mm. The unit is double-acting with a variable air cushion at both ends, running on 40 um filtered air at 0.15-1.0 MPa (22-145 psi) and speeds of 30-800 mm/s.
At 0.5 MPa the 25 mm bore generates 245 N forward and 206 N return, rising to 343 N and 288 N at 0.7 MPa against a 50 kgf theoretical peak. Its stainless rolled barrel and hard-chrome carbon-steel rod shrug off moisture and mild chemicals, an edge over painted minis in food and outdoor cells. Budget roughly 147 N for real work - about a 12 kg vertical lift at a 2:1 margin - and the built-in magnet accepts CMSG, DMSG and EMSG switches as standard.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MACJ25X250-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S Is Used
Recipe-driven dose pusher
Pushes powder doses from a hopper slide into sachet formers on a packaging machine, re-trimming the stroke whenever recipes change.
Pallet corner square-up
Squares pallet loads 250 mm at a stretch-wrapper infeed using cushioned stops that avoid bruising shrink-wrapped cartons.
Printing head parker
Parks a pad-printing head clear of the printing plate between cycles on a promotional-goods line, switch positions set by the standard magnet.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X250-30S the Right Cylinder?
One size down, the bore 20 MACJ, yields 157 N push at 0.5 MPa; one size up, bore 32, yields 402 N - this 25 mm model splits the two. Its 30 mm window fits changeover-driven lines where stroke points move between batches. With 250 mm of travel, keep side loads off the 10 mm rod by guiding the payload externally. Fasten with FA flange or LB foot and add I or Y knuckles where the load articulates; switches mount directly thanks to the standard magnet. Treat the adjuster purely as an extend-stroke stop: with air removed the rod is free to move, so positive holding needs a valve or external lock.
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 MACJ25X250-30S FAQ
Expect 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, and a 50 kgf theoretical maximum. The 250 mm stroke is adjustable within a 30 mm window (220-250 mm extend), cushioned at both ends, with 30-800 mm/s speed on 0.15-1.0 MPa (22-145 psi) air and a 1/8-inch port.
No. The external stop screw only shortens the extend stroke inside the ordered 30 mm window; it never extends travel and it never locks the piston. If air pressure is lost the rod still drifts, so use a blocking valve or a separate mechanical lock wherever holding is critical.
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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