VACUUM CHUCKS [Model KVR] CATALOG
Vacuum system required additionally


KVR-2D3060

KVR-H1530
KVR-H1530


 [Application]
Chucks to hold workpieces by utilizing atmospheric vacuum pressure. Nonmetallic and nonmagnetic materials can be held and machined. These chucks are suitable for grinding and cutting plastics and grinding aluminum, brass, stainless steel, ceramic and glass.
[Features]
  • The suction holes on the chuck work face can be arranged to set an effective holding area according to shapes of workpieces by combined adjustment of thread valves and valves.
  • The suction holes have cross grooves to expand the acting area. Thus, few thread valves are used to improve work efficiency.
  • The chuck work face is made of iron to allow self-grinding to recover parallelism.
  • Since the chuck work face is made of iron, magnetic devices such as workpiece stoppers can be utilized.
  • A special suction hole layout adapter can be installed according to workpieces and work procedures.
  • These chucks can be mounted on magnetic chucks.
  • Since no heat source or moving parts are used inside the chucks, highly precise machining is ensured.

squareKVR-D (Thread valve type)
  • An effective holding area can be set according to shapes of workpieces by combined adjustment of thread valves and valves.
  • Since suction grooves of cross shape are provided on the holding face, the number of thread valves has been reduced to enhance the work efficiency.

squareKVR-H (Small hole type)
  • Holes of φ4 are provided on the holding face at 8-mm pitches.

<Precautions for use>
The vacuum chuck is of such construction that the inside of the chuck is exhausted by a vacuum pump to reduce the internal pressure and a workpiece is held by atmospheric pressure. Therefore, the holding power is determined by a difference from atmospheric pressure and holding area. Due to physical restrictions, a difference in pressure that can be obtained by a pump is about 80 kPa (600 mmHg) in consideration of the upper limit of available exhaust efficiency. Since the same holding power as about 80 kPa (0.8 kgf/cm2) can be obtained, if the holding area of a workpiece is 100 cm2, it is held by a holding power of about 800 N (80 kgf). Note, however, if the holding face of workpieces is rough or distorted, if small, atmospheric pressure leak occurs to decrease the holding power significantly. For such workpieces, some leak preventing measures must be taken. Workpieces could be deformed by heat generated during machining depending on materials and thickness of workpieces. Pay attention to machining methods. In particular, thin stainless steel plates deform due to machining heat largely and are difficult to hold. If you have questions, please contact us.
[mm(in)]
Model Nominal Size Work Face Hole Pitch Mounting Face Height Mass Applicable
Vacuum System
B1 L1 t Be Le B2 L2 h H
KVR-2D1018 100(3.93)~175(6.89) 100(3.93) 175(6.89) 20
(0.78)		 85(3.34) 145(5.70) P=20
(Staggered layout)
(0.78)		 96(3.78) 195(7.67) 20
(0.78)		 70
(2.75)		 9kg/19lb VPU-E10
VPU-E20
VPU-D20
KVR-2D1325 125(4.92)~250(9.84) 125(4.92) 250(9.84) 105(4.13) 225(8.85) 121(4.76) 270(10.6) 15kg/33lb
KVR-2D1515 150(5.90)~150(5.90) 150(5.90) 150(5.90) 125(4.92) 125(4.92) 146(5.74) 170(6.69) 11kg/24lb
KVR-2D1530 150(5.90)~300(11.8) 300(11.8) 245(9.64) 320(12.6) 22kg/48lb
KVR-2D1545 150(5.90)~450(17.7) 450(17.7) 405(15.9) 470(18.5) 33kg/72lb VPU-E20
VPU-D20
KVR-2D2035 200(7.87)~350(13.7) 200(7.87) 350(13.7) 185(7.28) 305(12.0) 196(7.71) 370(14.5) 34kg/74lb
KVR-2D2050 200(7.87)~500(19.6) 500(19.6) 465(18.3) 520(20.4) 49kg/108lb
KVR-2D3060 300(11.8)~600(23.6) 300(11.8) 600(23.6) 285(11.2) 545(21.4) 296(11.6) 620(24.4) 88kg/194lb
※Clamp parts are included.
KVR-H1018 100(3.93)~175(6.89) 100(3.93) 175(6.89) 20
(0.78)		 72(2.83) 125(4.92) P=8
(0.31)		 96(3.78) 195(7.67) 20
(0.78)		 70
(2.75)		 9kg/19lb VPU-E10
VPU-E20
VPU-D20
KVR-H1325 125(4.92)~250(9.84) 125(4.92) 250(9.84) 92(3.62) 205(8.07) 121(4.76) 270(10.6) 15kg/33lb
KVR-H1515 150(5.90)~150(5.90) 150(5.90) 150(5.90) 125(4.92) 105(4.13) 146(5.74) 170(6.69) 11kg/24lb
KVR-H1530 150(5.90)~300(11.8) 300(11.8) 252(9.92) 320(12.6) 22kg/48lb
※Clamp parts are included.
VACUUM SYSTEM [Model VPU] CATALOG
VPU-E10
VPU-E10
VPU-D20
VPU-D20		 [Application]
A pressure reducing device dedicated to vacuum chucks. The chuck side is exhausted continuously to effectively maintain atmospheric pressure acting on workpieces on the chuck work face. Note, however, this equipment must not be modified to use it as a pressure vessel.
[Features]
  • An exhaust system, filter, vacuum tank and vacuum gauge are incorporated neatly.
  • Suction and exhaust operations to mount and dismount workpieces can be done quickly and 　easily with the attached special operating handle.
  • A difference in pressure over 80 kPa (600 mmHg) can be obtained continuously.
squareEjector type VPU-E
A vacuum system to reduce pressure by jetting air at high pressure (principle of the spray gun). This is recommended where an air line by use of a compressor is installed. This type can be used for both wet and dry machining operations. However, the use of a lubricator in the air line must be avoided.
squareDry pump type VPU-D
A vacuum system to reduce pressure by exhausting by a pump driven by a motor. A power source only is required to obtain an independent vacuum source. Note, however, this is recommended only for dry machining operations.
squareOther types
If the physical contact with the bottom face of work-pieces is poor, a large amount of air leaks, requiring a large exhaust amount. In such a case, a blower type is required for dry operations and a water-sealed vacuum pump is required for wet operations depending on work conditions. Please contact us.
Piping of vacuum system
■Ejector type VPU-E [‡o(in)]
Model Evacuation
Volume		 Continuous Pressure
Difference		 Suction
Port		 Compressed Air Dimensions Tank
Capacity		 Mass
Pressure Consumption Supply port Out. Dia. Height
VPU-E10 110N ℓ/min 80 kPa(600 mmHG)
or over.		 3/8 500-600kPa
(5-6kgf/㎠)		 180N ℓ/min 1/4 φ280(11.0) 425(16.7) 15ℓ 25kg/55lb
VPU-E20 220N ℓ/min 360N ℓ/min 3/8 φ330(12.9) 600(23.6) 30ℓ 45kg/99lb
※The capacity of a compressor to use must be 2.5 kW or over for VPU-E10 and 4.5 kW or over for VPU-E20.
※(1)Operating valve and (2)φ12 hose 10 m are included as accessories.

■Dry pump type VPU-D (for dry operations) [‡o(in)]
Model Evacuation
Volume		 Continuous Pressure
Difference		 Suction
Port		 Power
Source		 Dimensions Tank
Capacity		 Mass
Width Length Height
VPU-D20 220/260N ℓ/min(50/60Hz) 80 kPa(600 mmHG)
or over.		 3/8 3-phase 200 VAC, 0.4kW 320(12.6) 680(26.7) 690(27.1) 35ℓ 68kg/149lb
※(1)Operating valve, (2)φ12 hose 10 m and (3)power cable 5 m are included as accessories.

OPERATION BLOCK WITH VACUUM GAGE [Model VPU-OV] CATALOG



VPU-OV

 [Application]
An option to facilitate the use of vacuum chucks.

[Features]
  • The operating valve and the vacuum gage have been integrated to enable it to check the state of workpiece holding near the chuck.
  • By changing the location of the blank cap, a position to mount the vacuum gage can be selected from three places.