30207 Tapered Roller Bearing (Taper Roller Bearing), ISO 355

For a 35 mm shaft and a 72 mm housing bore, the 30207 tapered roller bearing (ISO 355) is 18.25 mm wide. Modeled as simplified STEP files.

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

• Also searched as: 30207 bearing
• Model id: iso355-30207
• Standard: ISO 355 · size 30207

Files

Part key	Simplified
iso355-30207	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		35		35	nominal	L1
D	Outside diameter		72		72	nominal	L1
T	Total width		18.25		18.25	nominal	L1
B	Cone width		17		17	nominal	L1
C	Cup width		15		15	nominal	L1
r1	Cone back face chamfer dimension	1.5			1.5	single limit (min), modeled at the limit	L1
r3	Cup back face chamfer dimension	1.5			1.5	single limit (min), modeled at the limit	L1
d1	Cone back face rib diameter		51.9 ref		51.9	reference value	L0 (ref: one source)
Y	Axial load factor		1.6		1.6	nominal	L1
alpha	Cup half angle		14.04		14.04	nominal	L0 (nom: one source)

Drawing

As a PDF: CC-ISO355-SZ-30207.pdf.

The 30207 tapered roller bearing beside the 32007X and the 32008X

The 30207 is number 10 of the 16 ISO 355 tapered roller bearings published here, listed from 30202 to 30210.

• Bore diameter (d): 35 mm on the 30207 tapered roller bearing, against 35 mm on the 32007X and 40 mm on the 32008X.
• Outside diameter (D): 72 mm on the 30207 tapered roller bearing, against 62 mm on the 32007X and 68 mm on the 32008X.
• Total width (T): 18.25 mm on the 30207 tapered roller bearing, against 18 mm on the 32007X and 19 mm on the 32008X.
• Cone width (B): 17 mm on the 30207 tapered roller bearing, against 18 mm on the 32007X and 19 mm on the 32008X.
• Cup width (C): 15 mm on the 30207 tapered roller bearing, against 14 mm on the 32007X and 14.5 mm on the 32008X.
• Cone back face chamfer dimension (r1): at least 1.5 mm on the 30207 tapered roller bearing, against at least 1 mm on the 32007X and at least 1 mm on the 32008X.
• Cup back face chamfer dimension (r3): at least 1.5 mm on the 30207 tapered roller bearing, against at least 1 mm on the 32007X and at least 1 mm on the 32008X.
• Cone back face rib diameter (d1): 51.9 mm (reference) on the 30207 tapered roller bearing, against 49.6 mm (reference) on the 32007X and 54.7 mm (reference) on the 32008X.

Other sizes

• One size smaller: 32007X Tapered Roller Bearing (Taper Roller Bearing), ISO 355, 35 mm bore, 62 mm OD, 18 mm wide.
• One size larger: 32008X Tapered Roller Bearing (Taper Roller Bearing), ISO 355, 40 mm bore, 68 mm OD, 19 mm wide.

Documents

• CC-ISO355-DS-30207.pdf: 30207 datasheet: values with levels, sources
• CC-ISO355-SZ-30207.pdf: 30207 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

nsk-tapered, ntn-bearingfinder-tapered, rule-iso355-cup-angle, skf-17000-tapered, timken-tapered. Full citations: the method page and this size's datasheet.

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