NSK7010A5TYDUMPA7Angular Contact Ball Bearing Duplex Set – 50 x 80 x 16 mm, 25° Contact Angle, Medium Preload, Ball-Guided Cage, Open

Product Description

What this part is

NSK 7010A5TYDUM super-precision angular contact ball bearing duplex set, 50 x 80 x 16 mm per bearing. Bore Diameter: 50 mm. Outside Diameter: 80 mm. Overall Width: 16 mm. Total Width: 32 mm. Contact Angle: 25°. Dynamic Load Rating: 31,000 N per bearing. Static Load Rating: 20,800 N per bearing. Limiting Speed: 15,400 rpm grease; 23,100 rpm oil. Preload: M medium, 580 N. Cage Type: Ball-guided. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Item Weight: 0.27 kg (0.60 lb) per bearing. Design Units: Metric. Series: 7000. Base Number: 7010. Part Number: 7010A5TYDUMPA7. Unit Quantity: 2 Pcs.

Decoding the designation

7010 — ISO 70 extra-light series angular contact ball bearing, 50 mm bore.

A5 — 25° contact angle.

TY — ball-guided cage.

DU — duplex universally ground, so any two pieces close to the set preload in any arrangement.

M — medium preload, 580 N in a back-to-back or face-to-face pair.

What these specs mean in practice

Contact Angle: 25°. The steeper angle carries more thrust and gives markedly higher axial stiffness than a 15° bearing on the same envelope, at the cost of speed. Limiting Speed: 15,400 rpm grease; 23,100 rpm oil.

Dynamic Load Rating: 31,000 N. Static Load Rating: 20,800 N. Permissible Axial Load: 16,200 N. Those are per-bearing figures as NSK publishes them.

Preload: M medium, 580 N. In a back-to-back or face-to-face pair the medium class gives 208 N/µm axial rigidity at a measured axial clearance of -14 µm. The ladder runs extra-light 125 N and 118 N/µm, light 262 N and 154 N/µm, medium 580 N and 208 N/µm, heavy 1,189 N and 278 N/µm: more preload buys stiffness and costs speed and heat. Internal Clearance is not applicable on a preloaded set.

Cage Type: Ball-guided. The cage is located by the rolling elements rather than by a ring land.

Mounting data

Shaft seat 50 mm. Housing bore 80 mm. Ring width 16 mm each, 32 mm across the pair. Effective load centre a: 23.2 mm. Shaft abutment da min: 56 mm. Housing abutment Da max: 74 mm. Housing abutment Db max: 75 mm. Chamfer r min: 1.0 mm. Second chamfer r1 min: 0.6 mm. Maximum shaft or housing fillet ra max: 1.0 mm. Second fillet rb max: 0.5 mm. Recommended grease quantity: 1.5 g per bearing.

Quantity and configuration

Unit Quantity: 2 Pcs. Arrangement / Configuration: Duplex universally ground set of two. Mounting Arrangement: Universally matchable back-to-back, face-to-face or tandem.

Interchange guidance

Closest match: NSK 7010A5TYDUM, the same bearing without the PA7 grade marking. SKF 7010 ACD/P4A, FAG B7010-E-T-P4S, IBC 7010-E-T-P4S, GMN S 6010 E TA, SNFA EX70/NS 9 CE3 and RHP 7010X3 are the 25° executions on the 50 x 80 x 16 mm envelope from those makers, sold as single bearings rather than a matched pair. Timken 3MM9110WI is the 25° Fafnir version with a phenolic land-riding cage. The carton cross 7010E uses the same E convention for 25°. Match the preload class and precision grade as well as the angle when substituting into a running spindle. Searchable variants of the number: 7010A5TYDUMPA7, 7010-A5-TY-DUM-PA7, 7010A5 TY DUM PA7, 7010A5TYDUM, 7010A5TYNDUM, 7010A5, 7010E.