Heavy-Duty B71926E.T.P4S.UM P4S Precision Spindle Bearings for Large CNC Lathe Workheads
| Item No : | B71926E.T.P4S.UM / B71926-E-T-P4S-UM |
| Size (d*D*B) : | 130x180x24mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 1.52 KG |
| MOQ : | 1 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The B71926E.T.P4S.UM / B71926-E-T-P4S-UM (130 x 180 x 24 mm) is a high-rigidity super-precision angular contact ball bearing engineered for large-bore CNC machine tool main spindles, heavy milling quills, and high-torque rotary tables. Featuring a 130mm inner shaft diameter, 180mm outer diameter, ultra-thin 1900-series cross-section (24mm width), a steep 25° contact angle (‘E’ design), an outer-ring-guided phenolic resin cage (‘T’), P4S ultra-precision tolerance rating, and universally matchable medium preload (‘UM’), it provides maximum axial load carrying capacity, outstanding dynamic stiffness, and minimal thermal growth during heavy cutting operations. We supply these super-precision spindle bearings under our proprietary RMO brand while supporting global multi-brand OEM direct sourcing for machine tool manufacturers, heavy spindle repair shops, and industrial equipment distributors worldwide.
⚙️Product Features:
- 25° Contact Angle for Maximum Rigidity (‘E’): Larger 25-degree contact angle significantly boosts axial thrust capacity and dynamic moment stiffness compared to 15° variants, making it ideal for heavy metal removal.
- Universal Matchable Medium Preload (‘UM’): Factory-ground flush raceway offset provides controlled medium preload force across arbitrary DB, DF, or DT sets without field adjustment, resisting heavy milling deflection.
- Super-Precision P4S Tolerance Rating: Meets stringent ISO Class 4S runout standards, maintaining sub-micron rotational truth and reducing chatter marks under high cutting forces.
- Outer-Ring Guided Phenolic Cage (‘T’): Textile-laminated phenolic resin retainer minimizes friction heating and lubricant breakdown during dynamic spindle speed changes.
⚙️Product Applications:
Engineered for severe axial cutting forces, high system rigidity, and precision shaft alignment, the B71926E.T.P4S.UM angular contact bearing is widely specified in:
- Heavy CNC machine tools: heavy-duty CNC lathe headstocks, gantry milling machine spindles, and horizontal boring quills.
- High-torque machining centers: 5-axis machining center tilting heads, heavy-duty gear milling spindles, and indexing heads.
- Industrial rotation machinery: heavy-duty rotary table pivot supports, precision drive shafts, and ball screw support units.
- Precision test & measurement: high-capacity spin test rigs, dynamometer main shafts, and aerospace balancing spindles.
⚙️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. | B71926E.T.P4S.UM / B71926-E-T-P4S-UM (Spindle Bearing) |
| Bearing Type | Ultra-Light Angular Contact Ball Bearing |
| Key Dimensions | 130x180x24mm (Inner d x Outer Dia D x Total Width/Height H) |
| Contact Angle | 25° Steep Contact Angle (‘E’ High-Rigidity Design) |
| Precision Class | P4 (ABEC-7) Class |
| Ring & Ball Material | High-Purity GCr15 / 52100 Chrome Bearing Steel |
| Cage Material & Type | Textile-Laminated Phenolic Resin Outer Guided (‘T’) |
| Preload & Pairing | Medium Preload Universal Single Bearing (‘UM’ Arrangement) |
| Target Application | CNC Lathes, Heavy Milling Heads, Boring Quills, Rotary Tables |
| 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 |
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