KVR-GV / KVR-G / VPU-EG / KVR

Product catalog summary

Overview of Vacuum Chucks (Model KVR)

Vacuum chucks are devices that hold workpieces by utilizing atmospheric vacuum pressure. They are suitable for machining nonmetallic and nonmagnetic materials such as plastics, aluminum, brass, stainless steel, ceramics, and glass. These chucks require an additional vacuum system to operate.

Features

Adjustable suction holes on the chuck face allow setting an effective holding area tailored to the shape of the workpiece by combining thread valves and valves.
Suction holes have cross grooves to expand the acting area, reducing the number of thread valves needed and improving work efficiency.
The chuck work face is made of iron, enabling self-grinding to restore parallelism and allowing the use of magnetic devices as workpiece stoppers.
Special suction hole layout adapters can be installed based on workpiece shape and machining procedures.
These chucks can be mounted on magnetic chucks.
No heat sources or moving parts inside the chuck ensure high precision machining.

Types of KVR Vacuum Chucks

KVR-D (Thread Valve Type)

Allows setting an effective holding area by adjusting thread valves and valves. Cross-shaped suction grooves reduce the number of thread valves, enhancing efficiency.

KVR-H (Small Hole Type)

Features φ4 mm holes spaced at 8 mm pitches on the holding face. Available upon request.

Precautions for Use

The vacuum chuck operates by exhausting the inside with a vacuum pump, creating a pressure difference that holds the workpiece by atmospheric pressure. The maximum pressure difference achievable is approximately 80 kPa (600 mmHg), corresponding to a holding power of about 0.8 kgf/cm².

For example, a workpiece with a 100 cm² holding area can be held with approximately 800 N (80 kgf) force. However, rough or distorted workpiece surfaces can cause leaks, significantly reducing holding power. Leak prevention measures are necessary for such cases.

Heat generated during machining can deform workpieces, especially thin stainless steel plates, making them difficult to hold. Appropriate machining methods should be considered, and consultation is recommended if issues arise.

Technical Specifications

Model	Nominal Dimensions (mm/in)	Top Plate Hole Pitch (mm/in)	Bottom Plate Height (mm/in)	Mass (kg/lb)	Applicable Vacuum System
KVR-2D1018	100×175 (3.93×6.89)	20 (0.78), staggered layout	70 (2.75)	9 (19)	VPU-E10, VPU-E20, VPU-D20
KVR-2D1325	125×250 (4.92×9.84)	20 (0.78)	121 (4.76)	15 (33)	VPU-E10, VPU-E20, VPU-D20
KVR-2D1515	150×150 (5.90×5.90)	20 (0.78)	146 (5.74)	11 (24)	VPU-E10, VPU-E20, VPU-D20
KVR-2D1530	150×300 (5.90×11.8)	20 (0.78)	245 (9.64)	22 (48)	VPU-E20, VPU-D20
KVR-2D1545	150×450 (5.90×17.7)	20 (0.78)	405 (15.9)	33 (72)	VPU-E20, VPU-D20
KVR-2D2035	200×350 (7.87×13.7)	20 (0.78)	196 (7.71)	34 (74)	VPU-E20, VPU-D20
KVR-2D2050	200×500 (7.87×19.6)	20 (0.78)	465 (18.3)	49 (108)	VPU-E20, VPU-D20
KVR-2D3060	300×600 (11.8×23.6)	20 (0.78)	296 (11.6)	88 (194)	VPU-E20, VPU-D20

Note: Clamp parts are included in the models listed.

Summary

The KVR vacuum chucks provide a versatile and precise solution for holding various materials during machining by using vacuum pressure. Their adjustable suction hole design and iron work face offer flexibility and durability. Users must consider surface conditions and heat effects on workpieces to ensure optimal holding performance. The product line includes multiple sizes and configurations to suit different machining needs, compatible with specific vacuum systems.