Airtac M5R Roller Lever Mechanical Valve M5R21006G
Mechanically actuated · no coil, no pilot airThe AirTAC Airtac M5R Roller Lever Mechanical Valve M5R21006G 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 | M5R21006G |
|---|---|
| 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) |
| Button colour | Green |
| 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 | G (BSPP parallel) |
| 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 M5R21006G
The M5R21006G is a 5/2-way mechanical control valve: external control, direct acting, and operated entirely by hand or machine - there is no coil, no wiring and no pilot port anywhere on it. A lever-mounted roller does the switching, and it is tripped by whatever passes over it, so a cam block on a moving carriage throws the spool simply by rolling across it. The roller works from either direction, so both the forward pass and the return pass of a machine element can be sensed.
This example is the 200-series single-control body with a 1/8in PT port and a green roller button, giving a 9.0 mm2 effective orifice (Cv 0.50). Because it is a sliding-column spool valve, the control force does not change with working pressure - there is no back-pressure effect, so changeover stays consistent from 0 to 1.0 MPa. The R actuator rides on a metal control set for long service life, the exhaust sits on top of the body so a silencer screws straight on, and the worn control set can be replaced as a spare (part M3R210-P14A) instead of discarding the valve.
Typical applications
Packaging line gate reversal
A cam fitted to the pusher bar of a carton-transfer conveyor trips the roller at each end of travel, reversing the 5/2 valve and the gate cylinder without any electrical position switch.
End-of-stroke signal on a press ram
Bolted at the bottom of a small pneumatic press, the roller is struck by a block on the descending ram, sending the spool over to vent the clamping cylinder - and it re-arms automatically as the ram rises.
Sliding door on a woodworking dust hood
The moving hood on a saw-dust enclosure rolls across the lever on every opening and closing, alternating supply to the lock cylinder on both passes, with the green button giving a clear visual position reference.
How to choose
Choose between the two rollers first: this R type switches on BOTH passes of a cam, while the M5L is deliberately one-directional and only trips on the return stroke - pick the L if you want a signal on the way back only, this R if every pass matters. If the state must hold after the cam has gone, step sideways to a manual-restoration actuator such as the M5Y lever instead, because the roller springs straight back with the cam.
Body and port: the 210 body here flows more than the 110 (9.0 mm2 versus 8.0 mm2) and is the one that offers the colour-coded actuator; stepping to the 1/4in port on the same 210 body raises flow to 12.0 mm2 (Cv 0.67), so size the port to the cylinder bore being switched. Do not let the cam overtravel the roller: the spool stroke is 2.0-3.0 mm and the roller stroke only 4.6-6.8 mm, and AirTAC states plainly that exceeding these limits damages the valve - set the cam block so the roller bottoms within its own travel.
Frequently asked questions
It is a 5/2-way external control, direct acting mechanical valve with a roller actuator and green button on the 200-series body. Operating pressure is 0-1.0 MPa (0-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, port PT1/8, effective area 9.0 mm2 (Cv 0.50). Body is aluminium alloy, air should be filtered to 40 um, and no lubrication is required - though if lubricated air is used, keep using the same medium throughout, ISO VG32 or equivalent.
The spool itself needs 2.0-3.0 mm of travel and the roller lever 4.6-6.8 mm. AirTAC publishes these as limits, not targets: pushing the roller beyond its stroke range damages the valve. Fix the trip cam so it fully throws the spool but stops the roller within the 4.6-6.8 mm band, and check the cam path is free of the lever on the return pass if the geometry allows the roller to swing clear.