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Power Skiving Cutters well explained! Capital Tool Industries

CTI manufactures power skiving cutter in Disc type, Shank type, Hub type for internal and external, spur and helical gears.

Enhanced productivity makes skiving process a highly innovative alternative to other machining processes like hobbing or shaping.

Gear qualities achieved by skiving process are much superior maintaining the profile and lead.

Power Skiving is specifically much preferred for internal splines and gears and for external parts where the clearance to a shoulder is limited.

PRODUCTS

Type of Skiving Cutters

Shank type

Hub type

Disc type

WORK PROCESS

How Does It Work?

To get a rough idea of the operating principle, you can imagine combining the gear hobbing with gear shaping.

The skiving cutter can be associated to a process with a multi thread gear hob; by extremizing the number of threads of the gear hob, so that each principle corresponds to a cutting tooth, you will obtain a skiving tool.

Unlike gear hobbing, the skiving process however creates an irregular distribution of the chips with a negative rake angle at the exit of the tool tip; for this reason, a multi-pass approach is required in skiving.

It cannot be regarded as a new manufacturing method, given that the first patent on skiving was filed in Germany in 1910. For almost a century, however, it did not spread due to technological limitations both in terms of software and hardware, which didn’t ensure reliability, precision and speed to make it convenient and productive.

Why Choose It?

Thanks to the recent technological evolution of machine tools, software and tooling itself, today skiving is a fast, efficient and flexible option to manufacture gears.

This technology allows to work the component in all its phases on a single multi-tasking machine or machining centre with a single setup.

LOREMN

What is Skiving ?

It is a gear manufacturing process, which with a dedicated solution is applicable both on internal and external gearing.

Skiving – especially as regards the solution with an interchangeable solid carbide head – allows the finishing of the tooth profile, and today it can be performed not only with the latest generation CNC gear cutting machines but also with multi-tasking machines or modern machining centres .

Feature Comparison of the internal gear processing method

Item Broaching Process Shaper Cutter Skiving Process
Process Productivity ◉ △ ◯
Processing accuracy ◉ ◯ ◯
Set-up performance △ ◉ ◉
Equipment Initial investment △ ◯ ◯
Tool Cost Initial 𐤕 ◉ ◉
Running ◯ △ （△）
Workpiece Blind hole gear 𐤕 ◯ ◯
Tocth profile, lead
adjust		 𐤕 𐤕 ◯
Method Hard processing after HT 𐤕 𐤕 ◯

Advantages Power Skiving

Higher quality: Rough machining the crown circle diameter and subsequent toothing in one clamping operation.

High productivity: Faster machining compared to traditional turning and gear shaping.
Easy handling: No parts logistics between operation.
In one clamping operation: Pre-turning and toothing in one clamping operation.
High flexibility: Fast, continuous machining of internal and external toothing, also against a flat collar or with undercut.
Increase in productive time: No extra loading time needed.

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