Compact Low-Friction Cylinder MQQ Series
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Product Description
A compact low-friction cylinder suitable for low pressures, low speeds, uniform speeds and low friction actuation.
[Features]
· Covers a range of actuation speeds and output controls thanks to its metal seal structure with minimal sliding resistance.
· Its minimal sliding resistance allows for low-pressure actuation at 0.005 MPa.
· Smooth and uniform-speed actuation ranges as low as 0.3 mm/s.
· Long lifespan: Long service life of 10,000 km or 100 million full cycles.
· Lateral load resistance: Features built-in ball bushings in the bearings for improved lateral load resistance. (MQQL)
· Its low sliding resistance allows output control in approximately 0.05‑N increments. (Based on cylinder piston area × pressure accuracy)
· No change to sliding resistance, even after extended periods of non-use.
Compact Low-Friction Cylinder MQQ Series Specifications
Compact Low-Friction Cylinder MQQ Series external appearance
Symbol: Double acting, single rod
Specifications
Standard Type: MQQT
| Tube Inner Diameter (mm) | 10 | 16 | 20 | 25 | 30 | 40 | |
|---|---|---|---|---|---|---|---|
| Seal Construction | Metal seal | ||||||
| Action | Double acting, single rod | ||||||
| Fluid | Air | ||||||
| Proof Pressure | 1.05 MPa | ||||||
| Maximum operating pressure | 0.5 MPa | ||||||
| Minimum operating pressure | 0.005 MPa | ||||||
| Ambient and Fluid Temperature | -10 to 80°C | ||||||
| Cushioning | Rubber bumper (equipped as standard) | ||||||
| Lubrication | Not required (non-lubricated) | ||||||
| Rod-end thread | Female thread | ||||||
| Stroke Length Tolerance | +1.0 0 | ||||||
| Piston Speed | 0.3 to 300 mm/s | ||||||
| Total Leakage Rate | Supply Pressure 0.1 MPa | 150 cm3/min | 200 cm3/min | 300 cm3/min | 400 cm3/min | ||
| Supply pressure 0.3 MPa | 800 cm3/min | 1,000 cm3/min | 1,200 cm3/min | 1,600 cm3/min | |||
| Supply pressure 0.5 MPa | 1,500 cm3/min | 2,000 cm3/min | 3,000 cm3/min | 4,000 cm3/min | |||
Lateral-Load-Resistant Type: MQQL
| Tube Inner Diameter (mm) | 10 | 16 | 20 | 25 | 30 | 40 | |
|---|---|---|---|---|---|---|---|
| Seal Construction | Metal seal | ||||||
| Action | Double acting, single rod | ||||||
| Fluid | Air | ||||||
| Proof Pressure | 1.05 MPa | ||||||
| Maximum operating pressure | 0.7 MPa | ||||||
| Minimum Operating Pressure*1 | 0.005 MPa | ||||||
| Ambient and Fluid Temperature | -10 to 80°C | ||||||
| Cushioning | Rubber bumper (Standard) | ||||||
| Lubrication*2 | Not required (non-lubricated) | ||||||
| Rod-end thread | Female thread | ||||||
| Stroke Length Tolerance | +1.0 0 | ||||||
| Operating Piston Speed*3 | 0.5 to 300 mm/s | ||||||
| Total Leakage Rate*4 | Supply Pressure 0.1 MPa | 150 cm3/min | 200 cm3/min | 300 cm3/min | 400 cm3/min | ||
| Supply pressure 0.3 MPa | 800 cm3/min | 1,000 cm3/min | 1,200 cm3/min | 1,600 cm3/min | |||
| Supply pressure 0.5 MPa | 1,500 cm3/min | 2,000 cm3/min | 3,000 cm3/min | 4,000 cm3/min | |||
*1: Value when horizontal. (Use clean, dry and nonfreezing air) However, as the stroke increases, it will likely be affected by the weight of its moving parts and the pressure will likely increase by approximately 0.003 to 0.005 MPa due to an offset load from the weight of the rod.
*2: See p. 339 in the SMC catalog regarding information on lubrication. This product uses turbine oil as an initial lubricant. Lubricant may seep out of the rod or the piping port.
*3: Control low speed actuation with differential pressure, speed controllers, etc. (Refer to the recommended circuit example on p. 319 of the SMC catalog for details.)
*4: The values are only for reference and are not guaranteed.
Diagram
Standard type / MQQT diagram
Lateral-load-resistant type / MQQL (built-in ball bushing type) diagram
Component Parts
| Number | Part Name | Material | Notes |
|---|---|---|---|
| 1 | Rod | Carbon steel | Hard chrome plated |
| 2 | Piston | Special stainless steel | - |
| 3 | Liner | Special stainless steel | - |
| 4 | Sleeve | Special stainless steel | - |
| 5 | Sleeve Retainer | Aluminum alloy | - |
| 6 | Plate | Aluminum alloy | Hard anodized aluminum |
| 7 | Guide | Fluororesin | - |
| 8 | Cylinder Tubing | Aluminum alloy | Hard anodized aluminum |
| 9 | Bumper A | Polyurethane | - |
| 10 | Bumper B | Polyurethane | - |
| 11 | Bushing | Aluminum alloy | - |
| 12 | Bottom Plate | Aluminum alloy | Hard anodized aluminum |
| 13 | O-ring | NBR | - |
| 14 | Retaining Ring | Carbon tool steel | Phosphate conversion coating |
| 15 | Bolt | Carbon tool steel | Chromate |
| 16 | Ball Bushing | - | - |
Mounting method
a) Mounting type A (when using the mounting plate threads)
*Always use a flat washer for mounting type A.
b) Mounting type B (when using the cylinder tube threads)
Applicable Mounting Bolt Dimensions Table
| Model | Mounting Type A | Mounting Type B | ||||
|---|---|---|---|---|---|---|
| Mounting Bolt Size | C (mm) | D: Thread Length (mm) | Mounting Bolt Size | E (mm) | ||
| Standard Type MQQT | MQQTB10-□D | M3 × 0.5 | 7 | 35 + stroke | M4 × 0.7 | 8 to 11 |
| MQQTB16-□D | M5 × 0.8 | 7 | 35 + stroke | M6 × 1 | 13 to 17 | |
| MQQTB20-□D | 8.5 | 40 + stroke | ||||
| MQQTB25-□D | 9 | 45 + stroke | ||||
| MQQTB30-□D | 7.5 | 50 + stroke | ||||
| MQQTB40-□D | M6 × 1 | 6 | 50 + stroke | M8 × 1.25 | 16 to 22 | |
| Lateral-Load-Resistant Type MQQL (Built-In Ball Bushing Type) | MQQLB10-□D | M3 × 0.5 | 7 | 65 + stroke | M4 × 0.7 | 8 to 11 |
| MQQLB16-□D | M5 × 0.8 | 5.5 | 70 + stroke | M6 × 1 | 13 to 17 | |
| MQQLB20-□D | 8 | 80 + stroke | ||||
| MQQLB25-□D | 6.5 | 85 + stroke | ||||
| MQQLB30-□D | 7 | 105 + stroke | ||||
| MQQLB40-□D | M6 × 1 | 7 | 105 + stroke | M8 × 1.25 | 16 to 22 | |
□: stroke
*See the SMC catalog for details of other specifications, structures, dimensional drawings, etc.