Wuxi Guangqiang Bearing Trade Co.,Ltd
| Width（B） | 50.5mm |
| Inner diameter（d） | 40mm |
| Certifiion | ISO9001:2015 |
| Supply Ability | 100000 Sets per month |
| Delivery Time | 3-5 working days |
| Precision rating | P0/P6 |
| Material | GCr15 Chrome Bearing Steel |
| Outer diameter（D） | 90mm |
| Bearing Model | 31308‑DF.A50‑90 |
| Payment Terms | T/T |
| Packaging Details | in individual packing box |
| Model Number | 31308‑DF.A50‑90 |
| Brand Name | GQZ /OEM |
| Place of Origin | China |
| Certification | ISO9001:2015 |
View Detail Information
Explore similar products
High Precision Taper Roller Bearings 30221 Open Seals Type Low Voice
L44543 inch GCR15 Taper Roller Bearings 60mm - 250 mm Outside Diameter
Tapered Roller Bearing 4T-HM88649PX1 Inch Taper Bearing GQZ
L305648/L305610 L305648/10 Tapered Roller Bearing 49.987 X 80.963 X 18.258 mm
Product Specification
| Width（B） | 50.5mm | Inner diameter（d） | 40mm |
| Certifiion | ISO9001:2015 | Supply Ability | 100000 Sets per month |
| Delivery Time | 3-5 working days | Precision rating | P0/P6 |
| Material | GCr15 Chrome Bearing Steel | Outer diameter（D） | 90mm |
| Bearing Model | 31308‑DF.A50‑90 | Payment Terms | T/T |
| Packaging Details | in individual packing box | Model Number | 31308‑DF.A50‑90 |
| Brand Name | GQZ /OEM | Place of Origin | China |
| Certification | ISO9001:2015 | ||
| High Light | Tapered roller bearing set 40x90x50.5mm ，Tapered roller bearing for rigid shaft ，Tapered roller bearing with rigid support | ||
31308‑DF.A50‑90 is factory back‑to‑back(DF/O‑type) matched tapered roller bearing set, made up of two 31308 single tapered roller bearings. It comes with preset A50‑90 preload. This unit can support combined radial and bidirectional axial loads, delivers high rigidity for precision industrial transmission equipment.
| Item | Value |
|---|---|
| Model | 31308‑DF.A50‑90 |
| d(Inner diameter) | 40 mm |
| D(Outer diameter) | 90 mm |
| 2T(Assembly total width) | 50.5 mm |
| Single cone width B | 23 mm |
| Single cup width C | 17 mm |
| Dynamic load rating | 153 kN |
| Static load rating | 165 kN |
| Arrangement | DF Back‑to‑Back (O‑type) matched pair |
| Pre‑load specification | A50‑90 factory preset preload range |
| Structure | Double single‑row tapered roller bearing matched set |
| Seal type | Open type |
| Material | GCr15 Chrome bearing steel |
| Weight | 1.52 kg |
| Limiting speed(grease) | 3000 r/min |
| Limiting speed(oil) | 4000 r/min |
*Ready stock. Short lead time. Fast delivery. Send us your bearing list and let’s get started!
Q: What does DF stand for?
A: DF means back‑to‑back(O‑type) arrangement for paired tapered roller bearings.
Q: What is A50‑90?
A: A50‑90 refers to factory preset preload range for this matched bearing set.
Q: Can I separate the two individual bearings?
A: Not recommended. Separating will destroy original matched pre‑load performance.
Q: Does this bearing need additional preload adjustment during installation?
A: Factory pre‑set, follow installation manual for minimal fine‑tuning only.
*Need custom bearings? Share your drawings, specifications or requirements — we’ll find the right solution for you.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
1989
Total Annual:
1000000-10000000
Employee Number:
10~100
Ecer Certification：
Verified Supplier
Established in 1999, Wuxi Guangqiang Bearing Trade Co.,Ltd works hard in researching and manufacturing high quality bearings and rely on it's advantages of strong technologies, advanced equipment, professional technical team, quality production and reasonable prices has gain a broad... Established in 1999, Wuxi Guangqiang Bearing Trade Co.,Ltd works hard in researching and manufacturing high quality bearings and rely on it's advantages of strong technologies, advanced equipment, professional technical team, quality production and reasonable prices has gain a broad...
Get in touch with us
Leave a Message, we will call you back quickly!