Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 MACJ20X75-30S
For stations where product height changes between runs, the MACJ20X75-30S trades fixed travel for a 30 mm band of adjustment, set by a stop screw at the head. Air works both sides of the piston and a variable cushion softens each end of travel.
The round stainless barrel and hard-chrome plated rod resist the corrosion that pits painted minis in food and outdoor cells. Force at 0.5 MPa reads 157 N forward and 131.9 N back; keeping real duty near 94 N, about an 8 kg vertical lift with margin, keeps the unit comfortably inside its rating.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 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 MACJ20X75-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MACJ20X75-30S Is Used
Multi-size carton stop
Sets a product stop on a conveyor that carries cartons of changing heights; the 30 mm window re-tunes the stop between SKUs in minutes.
Hopper slide gate
Actuates a small slide gate dosing granules from a hopper; variable cushioning quiets the gate slam on fast lines running up to 800 mm/s.
Potting nozzle press
Presses glue or epoxy nozzles onto connectors in an electronics potting cell, where the stainless barrel shrugs off resin spatter and wipe-down solvents.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X75-30S the Right Cylinder?
Run the numbers both directions: the 16 mm bore yields 100.5 N and the 25 mm yields 245.3 N at 0.5 MPa, bracketing the 157 N of this unit. Across 70 to 75 mm of trimmable travel keep side loads off the 8 mm rod or guide the load externally to avoid bending. The adjuster is an end stop, not a holding brake - on air loss the piston still moves - so lock with valving. FA and LB mounts plus I / Y knuckles cover fit-up, and the magnet ships inside for CMSG, DMSG or EMSG switches.
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 MACJ20X75-30S FAQ
Forces: 157.0 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, 32 kgf theoretical at 1.0 MPa. Bore 20 mm with an 8 mm rod (M8x1.25), 1/8 in port, 0.15-1.0 MPa (22-145 psi) working pressure, 30-800 mm/s speed, cushion variable at both ends, extend stroke adjustable across a 30 mm window.
The variable cushion at each end soaks up deceleration energy, so cycle speed can climb toward the top of the 30-800 mm/s range or heavier fixtures can stop without hammering the covers. Combined with the 30 mm trim band, one cylinder covers several station depths. A stainless barrel and hard-chrome rod keep it running in humid cells, and the standard magnet pairs with CMSG / DMSG / EMSG switches.
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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