SKF71914ACDP4ADGASuper-Precision Angular Contact Ball Bearing 70 x 100 x 16 mm, 25° Contact Angle, ABEC 7, Universally Ground Extra Light Preload

Product Description

What this part is

A single-row super-precision angular contact ball bearing in the SKF 719 dimension series, bore 70 mm, outside diameter 100 mm, width 16 mm. It is universally ground, so any two pieces of the same designation pair up to give extra light preload in a back-to-back, face-to-face or tandem arrangement.

Decoding the designation

71914 — single-row angular contact ball bearing, 719 dimension series, bore code 14 = 70 mm.

AC — 25° contact angle in the SKF scheme.

D — super-precision design (SKF ACD execution).

GA — universally matchable, extra light preload.

P4A — SKF super-precision tolerance class, equivalent to ABEC 7.

What these specs mean in practice

A 25° contact angle carries substantially more thrust than a 15° bearing of the same envelope and gives up some speed capability in exchange. The 719 series is the extra-light section, so the cross-section is slim — 15 mm of radial wall between bore and outside diameter — which suits compact spindle housings and stacked arrangements.

Extra light preload sets a defined ball contact with low friction and heat generation, suited to high speed at the cost of some axial stiffness.

Universal grinding is what makes any pair of GA pieces a usable set: the ring faces are ground so no additional shimming or measurement is required to reach the specified preload.

Quantity and configuration

Sale unit: 1 Pc. Single row, open both faces. Pairs with a second GA piece of the same designation to form an extra light preload set.

Fitting notes

Two pieces arranged back-to-back (DGA) give the widest support base and the highest moment stiffness; face-to-face is more tolerant of housing and shaft misalignment; tandem shares thrust in one direction between both rows. Clamping force passes through the rings, applied square against a rigid shoulder, never through the balls.

Interchange guidance

The ISO base number 71914 describes a 70 x 100 x 16 mm single-row angular contact bearing. At 25° and ABEC 7 the equivalents are FAG HCB71914-E-T-P4S class parts in steel form as B71914-E-T-P4S-UL, NSK 7914A5TRSULP3 in its A5 25° execution, and NTN 7914UADG/GNP4. Same-envelope pieces with a different angle letter — 71914 CD at 15° — or a different preload code — GB light — are related sizes rather than interchanges, since angle and preload set the thrust capacity, stiffness and speed of the assembly.