7203 Ball Bearings | McMaster-Carr

Support radial and thrust loads at the same time. These bearings are often found inside equipment such as gearboxes and pumps. For example, a bearing inside a gearbox withstands a radial load when the gear is engaged and a momentary thrust load when you shift to a new one. While they don't handle as much force from radial loads as standard bearings, you can pair them with a cylindrical roller bearing to increase their load capacity.

Single Row—Single-row bearings withstand thrust loads from one direction.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.

										Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Material	Dynamic Combined Load Cap., lbf	Max. Rotation Speed, rpm	Lubrication	Contact Angle	Min.	Max.	Bearing Trade No.		Each
Single Row







				Open

				17	40	12	3	Steel	2,300	20,000	Required	40°	-40	300	7203	6680K14	000000

High-Precision Angular Contact Ball Bearings

Open

Our most precise bearings for tackling radial and thrust loads at once, with tolerances tighter than a speck of dust. Rated ABEC 7 out of 9, they meet strict tolerance standards established by the Annular Bearing Engineers Committee (ABEC). Choose them for equipment that requires both high speed and pinpoint accuracy, such as machine tool spindles. For example, a bearing on a spindle withstands a radial load as it spins at high speeds and a thrust load when the cutting tool touches the workpiece. These bearings don’t handle as much force from radial loads as standard ones, but you can pair them with a cylindrical roller bearing to increase their load capacity.

Single Row—Single-row bearings withstand thrust loads from one direction.

Open—With no rubber seal to block airflow, these bearings dissipate heat quickly, extending the life of the lubricant and reducing friction over time.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

										Temp. Range, ° F
	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	ABEC Rating	Material	Dynamic Combined Load Cap., lbf	Max. Rotation Speed, rpm	Lubrication	Contact Angle	Min.	Max.	Bearing Trade No.		Each
Single Row







				Open

				17	40	12	7	Steel	2,550	40,400	Required	15°	-40	245	7203	4487N23	0000000

End Supports for Ball Screws and Precision Lead Screws

A set of ball bearings reduces friction and secures the end of a ball or lead screw. Note: The end of your ball or lead screw must be machined before installing it into an end support.

For Combined Radial and Thrust Loads About For Combined Radial and Thrust Loads

Image of Product. Front orientation. Contains Annotated. End Supports for Ball Screws and Precision Lead Screws. For Combined Radial and Thrust Loads.

End supports for combined radial and thrust loads handle radial loads (perpendicular to the lead screw) and thrust loads (parallel to the lead screw).

						Combined Load Cap., lbf			Face Mounting Holes			Top Mounting Holes
	ID	Ht.	Ctr. Ht.	Wd.	Dp.	Static	Dynamic	No. of Mounting Holes	Dia.	Ctr.-to-Ctr. Wd.	Ctr.-to-Ctr. Ht.	Dia.	Ctr.-to-Ctr. Wd.	Temp. Range, ° F		Each
Alloy Steel



		43/64"	2 3/8"	1 1/4"	4"	1 21/32"	3,200	1,550	6	13/32"	2 7/8"	1 3/8"	17/32"	2 7/8"	-40 to 210	60755K138	0000000


		Carbon Steel



				17 mm	64 mm	39 mm	86 mm	51 mm	1,300	3,050	4	—	—	—	9 mm	68 mm	0 to 160	6624K58	000000