Pneumatic Fitting

MQR Series Low Torque Metal Seal Type Rotary Union Fitting

The low torque, metal seal, rotary joint series MQR makes it possible to supply air to rotating and sliding components. Rotational torque is unaffected by supply pressure and temperature fluctuations. The use of metal seals prevents the spool from sticking to the rotating surface even after a long period of non- operation. Piping ports are aligned in a spiral line for easy piping.

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Product Feature

1. Rotational torque unaffected by supply pressure and temperature fluctuations.

2. Use of metal seals prevents the spool from sticking to the rotating surface even after a long period of non-operation.

3. Operating pressure: -100 kPa to 1 MPa

4. Piping ports are aligned in a spiral line for easy piping.

Symbol

MQR Low Torque Rotary Joint

Options/Mounting Bracket

Number of circuits	2 circuits	4 circuits	8 circuits	12 circuits	16 circuits
Flange part number	MQR2-F	MQR4-F	MQR8-F	MQR12-F	MQR16-F

Product Specifications

Model		MQR1-M5	MQR2-M5	MQR4-M5	MQR8-M5	MQR12-M5	MQR16-M5
Number of circuits (Number of ports)		1	2	4	8	12	16
Working medium		Air
Seal structure		Metal seal
Guide structure		Bearing supported	Bearing supported at both ends
Port size		Male R 1/8	M5 x 0.8
		Female M5 x 0.8
Flow rate characteristics	C	0.50 [dm³/(s·bar)]
	b	0.40
	Cv	0.17
Lubrication		Not required
Min. operating pressure		-100 kPa
Max. operating pressure		1.0 MPa
Working temperature ^{Note 1)}		-10 to 80℃
Max. start-up rotation torque ^{Note 2)}		≤0.003 N·m	≤0.03 N·m	≤0.05 N·m	≤0.10 N·m	≤0.20 N·m	≤0.50 N·m
Alowable rotation number ^{Note 5)}		3000 min^-1 (rpm) or less ^{Note 3)}	2000 min^-1 (rpm) or less	1500 min^-1 (rpm) or less	900 min^-1 (rpm) or less	600 min^-1 (rpm) or less	200 min^-1 (rpm) or less
Allowable radial load (allowable coupling axis reaction) ^{Note 4)}		1 N or less	15 N or less	30 N or less	40 N or less	50 N or less	50 N or less
Allowable axial load

The temperature 80°C includes temperature rise during rotation.
The start-up torque does not change with the supply pressure or with non-use (remains within the maximum start-up rotation torque), but it does change with the rotation number.
If using at a speed above 600 min^-1 (r.p.m.), ensure rotation is in the direction in which the joint is fastened.
Rubber / resin couplings are recommended due to their excellent absorption of off center, shocks, and vibrations.
min^-1: Number of rotations per 1 minute