High-Speed B71922C.T.P4S.UL P4S Precision Spindle Bearings for CNC Milling Machine Heads
| Item No : | B71922C.T.P4S.UL / B71922-C-T-P4S-UL |
| Size (d*D*B) : | 110x150x20mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.83KG |
| MOQ : | 1 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The B71922C.T.P4S.UL / B71922-C-T-P4S-UL (110 x 150 x 20 mm) is a super-precision high-speed angular contact ball bearing engineered specifically for CNC machine tool main spindles and high-rigidity rotary heads. Featuring a 110mm inner bore, 150mm outer diameter, ultra-thin 1900-series cross-section (20mm width), a 15° contact angle (‘C’ design), a textile-laminated phenolic resin cage (‘T’), P4S super-precision tolerance class, and universally matchable light preload (‘UL’), it delivers exceptional rotational accuracy, low vibration, and minimal dynamic friction at elevated RPMs. We supply these high-performance spindle bearings under our proprietary RMO brand while offering flexible multi-brand OEM direct sourcing (such as FAG/GMN/NSK equivalents) for machine tool builders, spindle rebuilders, and precision equipment distributors worldwide.
⚙️Product Features:
- Super-Precision P4S Tolerance Class: Exceeds standard ISO Class 4 tolerances for runout and radial clearance, ensuring sub-micron shaft centering and mirror-smooth workpiece finish.
- 15° Contact Angle & Phenolic Resin Cage (‘C’ & ‘T’): Optimized 15-degree contact angle paired with a lightweight outer-ring-guided phenolic cage minimizes centrifugal forces and friction heating during high-speed spindle acceleration.
- Universal Matchable Light Preload (‘UL’): Factory-ground flush raceway faces allow arbitrary DB, DF, or DT arrangement pairing, maintaining controlled stiffness and exact light preload without axial adjustment.
- Ultra-Compact 719 Series Envelope: 1900-series narrow cross-section profile saves critical spindle housing envelope space, accommodating larger hollow spindle shaft diameters for maximum system rigidity.
⚙️Product Applications:
Engineered for ultra-high rotational accuracy, low friction heating, and rigid spindle performance, the B71922C.T.P4S.UL angular contact bearing is widely specified in:
- Metal cutting machine tools: CNC milling machine spindles, high-speed motorized spindle units, and lathe headstock main shafts.
- Grinding & boring machinery: precision internal grinding wheelheads, boring machine spindles, and thread grinding quills.
- Precision rotary stages: high-accuracy direct-drive rotary tables, multi-axis machining center tilting heads, and indexing spindles.
- Semiconductor & optical equipment: wafer slicing machine drive spindles, optical glass lens polishers, and precision balancing machines.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model / Industry No. | B71922C.T.P4S.UL / B71922-C-T-P4S-UL (Spindle Bearing) |
| Bearing Type | Ultra-Light Angular Contact Ball Bearing |
| Key Dimensions | 110x150x20mm (Inner d x Outer Dia D x Total Width/Height H) |
| Contact Angle | 15° Contact Angle (‘C’ Designation) |
| Precision Class | P4 (ABEC-7) Class |
| Ring & Ball Material | High-Purity Bearing Steel GCr15 / 52100 |
| Cage Material & Type | Textile-Laminated Phenolic Resin Cage Outer Guided (‘T’) |
| Preload & Pairing | Light Preload Universal Single Bearing (‘UL’ Arrangement) |
| Target Application | CNC Motorized Spindles, Internal Grinders, Rotary Heads |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
| Model No. | d | D | H | m |
| B71920-C-T-P4S | 100 mm | 140 mm | 20 mm | 772 g |
| B71921-C-T-P4S | 105 mm | 145 mm | 20 mm | 803 g |
| B71922-C-T-P4S | 110 mm | 150 mm | 20 mm | 834 g |
| B71924-C-T-P4S | 120 mm | 165 mm | 22 mm | 1.16 KG |
| B71926-C-T-P4S | 130 mm | 180 mm | 24 mm | 1.52 KG |
| B71928-C-T-P4S | 140 mm | 190 mm | 24 mm | 1.62 KG |
| B71930-C-T-P4S | 150 mm | 210 mm | 28 mm | 2.5 KG |
| B71932-C-T-P4S | 160 mm | 220 mm | 28 mm | 2.63 KG |
| B71934-C-T-P4S | 170 mm | 230 mm | 28 mm | 2.79 KG |
| B71936-C-T-P4S | 180 mm | 250 mm | 33 mm | 4.14 KG |
| B71938-C-T-P4S | 190 mm | 260 mm | 33 mm | 4.33 KG |
| B71940-C-T-P4S | 200 mm | 280 mm | 38 mm | 6.05 KG |
| B71944-C-T-P4S | 220 mm | 300 mm | 38 mm | 6.6 KG |
| B71948-C-T-P4S | 240 mm | 320 mm | 38 mm | 7.1 KG |
| B71952-C-T-P4S | 260 mm | 360 mm | 46 mm | 12 KG |
| B71956-C-T-P4S | 280 mm | 380 mm | 46 mm | 12.9 KG |
| B71960-C-T-P4S | 300 mm | 420 mm | 56 mm | 20 KG |
| 71964 C | 320 mm | 440 mm | 56 mm | 25.5 KG |
| 71968 C | 340 mm | 460 mm | 56 mm | 24 KG |
| 71972 C | 360 mm | 480 mm | 56 mm | 28.5 KG |
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