Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications14 parameters

Core specifications
Parameter	Symbol	Value
Series		PTB7001
Bore diameter	d	12 mm
Outside diameter	D	28 mm
Width	B	8 mm
Basic dynamic load rating	C	4.35 kN
Basic static load rating	C0	1.63 kN
Fatigue load limit	Pu	0.171 kN
Mass	≈m	0.023 kg
Precision class		P4 — Class 4 (ISO 492:2023)
Sealing		Without — Not sealed
Cage		TVP — Polyamide cage
Lubricant		GA21 — Grease for super precision bearings, standard
Minimum operating temperature	Tmin	-30 °C
Maximum operating temperature	Tmax	120 °C

Product characteristics7 parameters

Product characteristics
Parameter	Symbol	Value
Preload class	M	Preload medium
Contact angle	E	Contact angle 25°
Tolerance class	P4	Class 4 (ISO 492:2023)
Type of Seal	Without	Not sealed
Cage	TVP	Polyamide cage
Arrangement bearing set	U	Single bearing
Lubricant	GA21	Grease for super precision bearings, standard

Main Dimensions & Performance Data8 parameters

Main Dimensions & Performance Data
Parameter	Symbol	Value
Bore diameter	d	12 mm0.472 in
Outside diameter	D	28 mm1.102 in
Width	B	8 mm0.315 in
Basic dynamic load rating, radial	Cr	4,350 N977.968 lbf
Basic static load rating, radial	C0r	1,630 N366.457 lbf
Fatigue load limit, radial	Cur	171 N38.444 lbf
Limiting speed for grease lubrication	nG Grease	48,000 1/min
Mass	≈m	0.023 kg0.051 lbs

Mounting dimensions11 parameters

Mounting dimensions
Parameter	Symbol	Value
Diameter shaft shoulder	da	16.5 mm0.65 in
Diameter shaft shoulder clearance	da	h12
Shoulder diameter outer ring	Da	24.5 mm0.965 in
Shoulder diameter outer ring clearance	Da	H12
Maximum recess radius	ra max	0.3 mm0.012 in
Maximum recess radius	ra1 max	0.1 mm0.004 in
Minimum diameter injection pitch	Etk min	17.9 mm0.705 in
Maximum diameter injection pitch	Etk max	19 mm0.748 in
Minimum diameter injection pitch	Etk1 min	17.9 mm0.705 in
Maximum diameter injection pitch	Etk1 max	19 mm0.748 in
Distance between the apexes of the pressure cones	a	8.7 mm0.343 in

Dimensions3 parameters

Temperature range2 parameters

Temperature range
Parameter	Symbol	Value
Operating temperature min.	Tmin	-30 °C-22 °F
Operating temperature max.	Tmax	120 °C248 °F

Capabilities & suitability4 parameters

Capabilities & suitability
Parameter	Symbol	Value
Radial load capacity		Yes
Axial load capacity in one direction		Yes
Suitable for grease lubrication		Yes
Unsealed design		Yes

Manufacturer Identity6 parameters

Product Identity2 parameters

Product Identity
Parameter	Symbol	Value
Construction		Precision bearing for driven tools PTB70..-E, adjusted, in pairs or sets, contact angle α = 25°
Short Description		Spindle bearing

Additional information3 parameters

Technical Data24 parameters

Technical Data
Parameter	Symbol	Value
Bore Diameter (D)		12 mm
Outside Diameter (D)		28 mm
Width (B)		8 mm
Basic Dynamic Load Rating, Radial (Cr)		4,350 N
Basic Static Load Rating, Radial (C0R)		1,630 N
Operating Temperature Min. (Tmin)		-30 °C
Operating Temperature Max. (Tmax)		120 °C
Axial Rigidity Medium (Ca M)		58 N/µm
Diameter Shaft Shoulder (Da)		16.5 mm
Lift Off Force Medium (Kae M)		317 N
Maximum Diameter Injection Pitch (Etk1 Ma)		19 mm
Maximum Diameter Injection Pitch (Etk Max)		19 mm
Minimum Diameter Injection Pitch (Etk1 Mi)		17.9 mm
Preload Force Medium (Fv M)		105 N
Shoulder Diameter Outer Ring (Da)		24.5 mm
Limiting Speed For Grease Lubrication (Ng Grea)		48,000 1/min
Minimum Diameter Injection Pitch (Etk Min)		17.9 mm
Fatigue Load Limit, Radial (Cur)		171 N
Minimum Chamfer Dimension (Rmin)		0.3 mm
Maximum Fillet Radius (Ra Max)		0.3 mm
Maximum Recess Radius (Ra1 Max)		0.1 mm
Minimum Chamfer Dimension (R1 Min)		0.3 mm
Contact Angle (Α)		25 °
Distance Between The Apexes Of The Pressure Cones (A)		8.7 mm