ITP’s Disc Stylus with a ruby-tipped ball delivers a compact, robust probing tip designed for precise internal measurements. Built for CMM work, this Type M disc stylus threads directly into M5 receivers and is ideal when you need to measure large inside diameters and features such as undercuts with high repeatability.

• Thread Size: M5
• Ball Diameter: 12 mm
• Overall Length: 5 mm
• Shank Diameter: 7 mm
• Base Material: Stainless steel
• Ball Material: Ruby (ruby-tipped ball on a stainless steel base)
• Styli Type: Type M
• Part Number: KIM503012M50
• Recommended Use: Probing internal features and undercuts in bores and passages
• Z-axis Note: Normal disks are unsuitable for probing in the Z direction (except discs with radius end rollers)

Spherical disc styli like this model are essential when conventional ball tips can’t reach recessed features or when large internal diameters must be measured with accuracy. The ruby ball provides excellent wear resistance, while the stainless steel base offers durability and stable contact during measurement. This combination supports consistent, repeatable results across a range of metrology tasks, from routine QC checks to in-depth bore inspections.