Airtac M5R Roller Lever Mechanical Valve M5R21006
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5R Roller Lever Mechanical Valve M5R21006 is a genuine 5/2-way roller type control valve. A roller lever tripped by a passing cam, slide or carriage. Works from either direction. It is an external control, direct-acting valve - the spool is moved mechanically, so there is nothing to wire and no pilot line to plumb. Ports are PT1/8 with a 9.0 mm2 (Cv 0.50) effective area.
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Specifications
| Model | M5R21006 |
|---|---|
| Valve type | 5/2 way, external control, direct acting |
| Actuation | Roller type |
| Reset | Automatic (spring) restoration |
| Body series | 200 Series, single control |
| Port size | PT1/8 |
| Effective area | 9.0 mm2 (Cv 0.50) |
| Fluid | Air, filtered by a 40 um element |
|---|---|
| Pressure range | 0 - 1.0 MPa (0 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to +70 C |
| Body material | Aluminium alloy |
| Lubrication | Not required |
| Thread standard | PT (Rc tapered) |
| Spool stroke | 2.0-3.0 mm |
| Actuator stroke | 4.6-6.8 mm at the roller |
Sliding-column (spool) construction, so operating force is not affected by working pressure - there is no back-pressure effect. Lubrication is not required, but once the valve has been run on lubricated air it must stay on lubricated air; AirTAC suggests ISO VG32 or equivalent. The roller type control set is METAL, which gives a longer service life than the engineering-plastic heads. The exhaust outlet sits on top of the body, so a silencer fits directly.
About the M5R21006
The AirTAC M5R21006 is a 5/2-way external control, direct acting valve whose spool is thrown by a mechanical roller lever, not by a solenoid coil or an air pilot signal. There is no coil, no lead and no pilot port anywhere on the body: a passing cam, carriage or machine dog strikes the roller, the valve changes over, and when the trip piece rolls off the lever returns with the actuator and the valve springs back. It is a genuinely pneumatic component, which is why it belongs on manual stations, position-sensing points and areas where electricity is unwanted.
This is the 200 Series single-control body with a 1/8in PT port and an effective area of 9.0mm2 (Cv 0.50). The sliding-column spool construction means the changeover force is not affected by working pressure, so the valve trips identically at low and high pressure with no back-pressure effect to fight. The exhaust outlet sits on top of the body, so a silencer screws straight on and keeps the station quiet.
Typical applications
End-of-stroke signal on a linear slide
Bolt the roller lever so the cylinder's tool plate or a striker bolt on the slide trips it at full extension. The valve reverse-signals the cylinder to retract, and the roller resets automatically as the slide passes back over it.
Clamp-and-cut sequence on a small press
On a pneumatic clamping fixture feeding a cutting head, position the M5R21006 so the clamp ram's collar rolls over the lever once the part is gripped, switching air to the cutting cylinder in one purely mechanical step with no wiring on the machine frame.
Return-stroke confirmation in a two-hand station
Use the roller as the home-position confirmation in a foot-pedal or two-hand-start press circuit: when the ram comes back over the roller, the valve confirms retraction and re-arms the start circuit, all without a single electrical interlock.
How to choose
The roller choice here is really a question of one pass or two. The M5R trips in both directions of travel, so it suits a carriage that must switch the valve on the way out and again on the way back. If you only want the valve to fire on the return pass, the one-directional M5L roller (valid impact from one side only) is the neighbouring option. If you would rather an operator press a button than a cam strike a roller, step to the M5PP protruding button on the same 210 body. On size, the 210 body at 1/8in gives 9.0mm2 (Cv 0.50); moving to the 1/4in port on the same body lifts this to 12.0mm2 (Cv 0.67), which is the step to take when the cylinder is a size larger.
Mind the reversal stroke: on this model the spool stroke must stay within 2.0-3.0mm and the total actuator stroke at the roller within 4.6-6.8mm. A cam or ramp that pushes past these limits will damage the valve, a limit AirTAC states explicitly in the datasheet, so profile your trip piece before installation.
Frequently asked questions
The M5R21006 is a 5/2-way external control, direct acting mechanical valve with a roller lever on the 200 Series single-control body and a 1/8in PT port. Operating pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), and the temperature range is -20 to +70 C. Effective area is 9.0mm2 (Cv 0.50). The body is aluminium alloy, the medium is air filtered by a 40um element, and lubrication is not required, though once lubricated air is introduced you should stay with it, using ISO VG32 or equivalent.
AirTAC publishes reversal-stroke limits that must not be exceeded: on the M5R21006 the spool stroke is 2.0-3.0mm and the total actuator stroke at the roller is 4.6-6.8mm. Exceeding these figures damages the valve, so the cam or ramp must be profiled so it fully trips the lever but cannot overtravel it. Also note the metal control set on this model is built for repeated mechanical tripping, but the valve is a control component, not a safety-rated device, and should never be wired into or relied upon as an emergency stop.