3.96875 mm Steel Ball (Bearing Ball), ISO 3290-1

The 3.96875 mm steel ball (ISO 3290-1): nominal ball diameter 3.96875 mm, corresponding inch size 0.15625 mm. Available as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 3.96875 mm steel ball
• Model id: iso3290-d3-96875
• Standard: ISO 3290-1:2014 · size 3.96875 mm

Files

Part key	Simplified
iso3290-d3-96875	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
Dw	Nominal ball diameter		3.96875		3.96875	nominal	L1
Dw_inch	Corresponding inch size		0.15625		0.15625	nominal	L1

Drawing

As a PDF: CC-ISO3290-SZ-3.96875.pdf.

The 3.96875 mm steel ball beside the 3.57188 mm and the 4 mm

The 3.96875 mm is number 9, counting from the smallest, of the 28 ISO 3290-1 steel balls published here, from 2 mm to 8 mm.

• Nominal ball diameter (Dw): 3.96875 mm on the 3.96875 mm steel ball, against 3.57188 mm on the 3.57188 mm and 4 mm on the 4 mm.
• Corresponding inch size (Dw_inch): 0.15625 mm on the 3.96875 mm steel ball, against 0.140625 mm on the 3.57188 mm.

Other sizes

• One size smaller: 3.57188 mm Steel Ball (Bearing Ball), ISO 3290-1.
• One size larger: 4 mm Steel Ball (Bearing Ball), ISO 3290-1.

Documents

• CC-ISO3290-DS-3.96875.pdf: 3.96875 datasheet: values with levels, sources
• CC-ISO3290-SZ-3.96875.pdf: 3.96875 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

ceramicspeed-balls-datasheet, iso3290-1-2014-sample, mba-balls-catalogue. Full citations: the method page and this size's datasheet.

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