Universal Matched Pair Angular Contact Ball Bearing 71916C DB DF DT P4 Machine Tool Bearing

The 71916C universal matched pair angular contact ball bearing is a 15 degree C-series unit supplied ready for DB, DT, DF, DBB and QBC mounting without extra grinding. Universal matching means any two bearings of the same batch can be combined to reach the required preload and stiffness, simplifying spindle assembly and spares stocking. An 80 mm bore, 110 mm outside diameter and 16 mm width sit behind a basic dynamic load rating of 34.5 kN and a static rating of 36.0 kN. At P4 precision the pair runs accurately up to 12000 RPM grease speed and 19000 RPM oil speed.

• Universal Matching: Bearings are interchangeable within a batch, so they can be assembled into DB, DT, DF, DBB and QBC sets without hand grinding or pairing.
• Ready Made Bearing Sets: Pairs share the same preload and stiffness, speeding spindle assembly and cutting the number of spares a workshop must stock.
• P4 Precision Grade: Tight bore and runout control keeps the matched set accurate and low vibration in demanding machine tool duty.
• High Combined Load: A 34.5 kN dynamic rating and 36.0 kN static rating carry heavy combined axial and radial load in preloaded arrangements.
• Configurable Preload: Light and medium preload options let builders tune stiffness, speed and heat for milling, turning or grinding spindles.
• Proven C-Series Geometry: The 15 degree contact angle balances speed and axial stiffness, matching standard spindle housing designs.

The 71916C universal matched pair is used in machine tool spindles, precision gearbox shafts, high accuracy rotary tables and measuring spindles where a stiff, accurately preloaded bearing set is required. Because the bearings are universal, OEM builders and repair shops can assemble DB, DT, DF or DBB arrangements on site and keep fewer part numbers in stock. It suits turning, milling and grinding heads running within the 12000 to 19000 RPM range.

Matched bearings are kept together as a numbered set, wrapped in anti-rust paper, cushioned with foam and packed in a labeled export carton to protect pairing accuracy during transit. Bore, runout, clearance and preload are verified before packing, and inspection reports covering the matched set can be issued per batch. Custom preload classes, matched arrangements and grease options are available for spindle builders, with pallet consolidation for large export orders.