Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X70-10S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X70-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 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 MACJ20X70-10S
Fine setting between 60 and 70 mm is what the -10 window buys you on the MACJ20X70-10S: the extend-side stop screw takes up small positioning errors without shims, while the cylinder stays double-acting with variable air cushions at both ends. Push is 157 N at 0.5 MPa and pull 131.9 N, of which about 94 N is a realistic working share.
Underneath, this is the standard MA round body: stainless tube, hard-chrome plated rod and riveted aluminium covers that seal reliably in dusty or damp corners. The cushion absorbs end-of-stroke shock so a fast stamping or pressing cycle can run to 800 mm/s without pounding the covers.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X70-10S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X70-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 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 MACJ20X70-10S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -10 | 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 MACJ20X70-10S Is Used
Date coder head
Carries a hot-foil stamp head on a carton date coder; the 10 mm trim sets print depth in small steps, and the cushion keeps each impression crisp at line speed.
Depth-gauge stop
Acts as an adjustable stop pin on a drill depth gauge, holding its 60-70 mm setting against repeated part contact without creeping.
Label press roller
Presses a small roller onto labels on a sleeve labeller; 157 N at 0.5 MPa is ample for label work and the dual cushions soften every pass.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X70-10S the Right Cylinder?
If 157 N push at 0.5 MPa overshoots the job, the bore 16 MACJ at 100.5 N is the leaner pick; if you need more than the roughly 94 N this size should dedicate to the work, step up to the 245.3 N bore 25 MACJ. The narrow 10 mm window is for fine setting between 60 and 70 mm, not for gross stroke changes.
Treat the stop screw as an extend-side position set only - it will not lock the piston against drift when pressure drops. FA and LB mountings fit, I and Y knuckles are available, and no SDB option exists on adjustable models.
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 MACJ20X70-10S FAQ
Push is 157 N and pull 131.9 N at 0.5 MPa supply; stepping up to 0.7 MPa gives 219.8 N push and 184.7 N pull. The theoretical figure at 1.0 MPa is 32 kgf. Operating band is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
A variable air cushion sits at both ends. Turn the cushion needle to slow the last few millimetres of travel, so faster speeds up to 800 mm/s or heavier loads stop against the covers without shock. The -10 stop screw only sets the extend position; the cushions do the shock control.
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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