Shaft

Straight Shaft

Shaft parts are rod-shaped components that serve as rotational centers and are commonly used as power transmission shafts or linear motion guides. They are widely utilized across various industries, including automotive, marine, industrial machinery, and home appliances. In precision machinery, even the slightest vibration or dimensional change due to thermal effects is unacceptable, so careful consideration is given to both material selection and design.

Characteristics

Shape	End processing: double-sided, single-sided, slotted, grooved, etc.
Size	Outer diameter: φ0.4 to φ15.0 *φ15.0 and aboveContact UsPlease give me
	Total length: 1mm to 150.0mm
accuracy *Depending on material, dimensions and shape Varies	Outer diameter tolerance: 0.0005mm
	Roundness: 0.0001mm
	Cylindricity: 0.0001mm
	Surface roughness: Ra0.02
	Bend: 0.02mm or less
Material	Hard materials, hardened materials, etc.

Straight shaft processing is an important technology that forms the foundation of TNK products.

TNK utilizes centerless machining technology and boasts world-class precision in outer diameter tolerance and roundness. Utilizing this strength, we contribute to quieter operation, faster rotation, and longer life. End faces can be ground to F, R, and T surfaces.

We can also handle a wide range of materials, including stainless steel, composite materials, and resin.

TNK's straight shafts have a wide range of applications, from home appliances such as VHS tapes and digital cameras to automotive motors and hydraulic equipment.

Grinding is a processing method suited to mass production, so we can handle mass production of over 100 million units per month.

Processing example

■ End face

・Core misalignment: 0.01mm
・Surface roughness Ra0.05

・Squareness: 0.003mm
・Total length 0.001mm
・Surface roughness Ra0.03

・Pointed angle ±1.0°
・Point diameter 0.04mm
・Surface roughness Ra0.05mm

■ Stage

・Step diameter 0.004mm
・Concentricity: 0.001mm
- Surface roughness Ra0.1

Both levels and the middle level are also possible.
*As this is a special-purpose machine, the quantity, shape, and material may vary.Varies.

Why choose TNK?

High-precision machining is possible

At TNK, we are capable of high-precision grinding with an outer diameter precision of 0.5μm, roundness of 0.1μm, and cylindricity of 0.1μ.

In addition, by combining it with other processes such as heat treatment and barrel processing, it is possible to achieve cylindrical surface roughness of Ra0.02 or less.

Wide range of materials available

At TNK, in addition to austenitic and martensitic stainless steel, we can process a wide range of materials, such as ferrous materials and bearing steel. Each material has different properties, such as corrosion resistance and magnetism. At TNK, we can also consult with you to find the material that best suits your application.

Points to note when selecting

Consultation is required depending on the required accuracy

TNK specializes in processing high-precision straight shafts, but the level of precision we can provide varies depending on the material and shape.

The precision that can be achieved differs between martensitic stainless steel, which hardens when heat treated, and relatively soft materials such as austenitic stainless steel, so we may need to consult with you.

At TNK, our processing specialists set up construction methods that best meet the needs of our customers' designs.

The straight shaft shape makes the most of TNK's technology, so please feel free to contact us if you have any questions.

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