
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X10-10S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 10mm 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.
Ten millimetres of stroke with a full 10 mm trim window makes this a precision ejector: the stop screw sets the extend stroke to the exact point your fixture needs, and the variable cushion at both ends lands the piston gently. Inside is a riveted stainless barrel and a hard-chrome plated rod that shrug off washdown and humidity, running on 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
This 20 mm bore pushes 157.0 N and pulls 131.9 N at 0.5 MPa; at 0.7 MPa push rises to 219.8 N with a theoretical 32.0 kgf ceiling. Keep working force near 94 N at 0.5 MPa for long seal life, and figure about 8 kg of vertical lift when you halve the rating for margin. The magnet is part of the standard build, so CMSG / DMSG / EMSG switches drop straight on.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X10-10S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 10 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.
| 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.
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×10 | 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.
Clamps small circuit-board fixtures ahead of a soldering station; the 10 mm trim window sets clamp travel to the fixture height exactly.
Flicks capped vials off a vibratory bowl track into a collection chute; the short, cushioned stroke stops parts being flung.
Presses nylon standoffs into appliance housings with 157 N at 0.5 MPa - light enough not to crack the boss, strong enough to seat fully.
Need more than 94-157 N? The 25 mm bore reaches 245.3 N push at 0.5 MPa; going down, the 16 mm bore manages 100.5 N. At a 10 mm stroke, side load is the real enemy - keep the load guided or add an I or Y knuckle rather than letting the 8 mm rod bend. Foot (LB) and flange (FA) options plus the built-in magnet with CMSG / DMSG / EMSG compatibility make installation quick, and the trim stop parks position without holding a load once air is removed.
Quick checklist
Expect 157.0 N push and 131.9 N pull at 0.5 MPa, rising to 219.8 N push and 184.7 N pull at 0.7 MPa, with a 32.0 kgf theoretical maximum. That works out to about 94 N of dependable working force at 0.5 MPa. The fluid is air filtered to 40 um, the rod is 8 mm with M8x1.25 male thread, and ports are 1/8".
The riveted stainless barrel and hard-chrome plated rod resist the washdown, condensation and light chemicals that pit painted bodies - useful around food and lab equipment. The variable cushion at both ends also tames the short 10 mm stroke, and the standard magnet accepts DMSG / EMSG / CMSG switches without a special-order piston.
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Covers non-human-caused product damage.
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