RLS28 Bearing LJ3.1/2 Single Row Ball Bearings LS 20 3.5” Bore
Inner Diameter (d): 88.90mm (3.50 inch)
Outer Diameter (D): 165.10mm (6.50 inch)
Width (B): 28.57mm (1.125 inch)
Mass: 2.45kg (5.401 lb)
Number of Row: single
Cage Material: steel
Rings & Balls Material: chrome steel
Equivalents: RLS 28, RLS-28, LS 20, LS20, LJ 3 1/2, LJ3.1/2
RLS28 Bearing Specification:
RLS28 bearing is inch size deep groove ball bearing.
Regarding this bearing,
Inner Diameter (d): 88.90mm (3.50 inch)
Outer Diameter (D): 165.10mm (6.50 inch)
Width (B): 28.57mm (1.125 inch)
Mass: 2.45kg (5.401 lb)
Number of Row: single
Cage Material: steel
Rings & Balls Material: chrome steel
Precision: standard P0 (P0 = ABEC1)
Lubrication: standard grease or oil lubrication
Equivalents: RLS 28, RLS-28, LS 20, LS20, LJ 3 1/2, LJ3.1/2
Key Advantages:
1. Durability & Long Service Life – RLS 28 bearing is made from high-quality bearing steel, ensuring resistance to wear and extending operating life.
2. Smooth Operation – The low friction design of LJ 3 1/2 bearing provides quieter and more efficient performance.
3. Versatility – Bearings LS20 are suitable for radial and limited axial loads in both directions.
4. Easy Replacement – Inch-size design (RLS series) allows compatibility with older equipment or machinery using inch-dimension bearings.
5. Wide Application Range – Commonly used in electric motors, industrial machinery, conveyors, and automotive applications.
RLS Bearing Equivalent Reference Guide:
| RLS 4 | LS 5 | LJ 1/2 | RLS 4 |
| RLS 5 | LS 7 | LJ 5/8 | RLS 5 |
| RLS 6 | LS 8 | LJ 3/4 | RLS 6 |
| RLS 7 | LS 9 | LJ 7/8 | RLS 7 |
| RLS 8 | LS 10 | LJ 1 E | RLS 8 |
| RLS 9 | LS 11 | LJ 1 1/8 | RLS 9 |
| RLS 10 | LS 12 | LJ 1 1/4 | RLS 10 |
| RLS 11 | LS 12 1/2 | LJ 1 3/8 | RLS 11 |
| RLS 12 | LS 13 | LJ 1 1/2 | RLS 12 |
| RLS 13 | LS 13 1/2 | LJ 1 5/8 | RLS 13 |
| RLS 14 | LS 14 | LJ 1 3/4 | RLS 14 |
| RLS 15 | LS 14 1/2 | LJ 1 7/8 | RLS 15 |
| RLS 16 | LS 15 | LJ 2 E | RLS 16 |
| RLS 18 | LS 16 | LJ 2 1/4 | RLS 18 |
| RLS 20 | LS 17 | LJ 2 1/2 | RLS 20 |
| RLS 22 | LS 18 | LJ 2 3/4 | RLS 22 |
| RLS 24 | LS 19 | LJ 3 E | RLS 24 |
| RLS 26 | LS 19 1/2 | LJ 3 1/4 | RLS 26 |
| RLS 28 | LS 20 | LJ 3 1/2 | RLS 28 |
| RLS 30 | LS 20 1/2 | LJ 3 3/4 | RLS 30 |
| RLS 32 | LS 21 | LJ 4 E | RLS 32 |
| RLS 34 | LS 21 1/2 | LJ 4 1/4 | RLS 34 |
| RLS 36 | LS 22 | LJ 4 1/2 | RLS 36 |
| RLS 38 | LS 22 1/2 | LJ 4 3/4 | RLS 38 |
| RLS 40 | LS 23 | LJ 5 E | RLS 40 |
| RLS 44 | LS 23 1/2 | LJ 5 1/2 | RLS 44 |
Questions buyers ask when RLS28 and 8221 is still under review
When is RLS28 and 8221 worth comparing against nearby deep groove ball bearings options?
Comparison helps when dimensional fit is only part of the decision and load direction, sealing, clearance, speed, temperature, or repeat-order stability still need to be confirmed. Reviewing one or two nearby options early usually reduces sourcing mistakes later.
What details usually matter before approving RLS28 and 8221 for repeat supply?
Buyers normally confirm the part reference, main dimensions, application, speed range, operating environment, sealing needs, and any packaging or marking requirements. That gives the supplier a cleaner basis for confirming availability and suitable alternatives.
Which next step usually helps after RLS28 and 8221 is shortlisted?
A quick review of Deep Groove Ball Bearings, one more commercial destination, and one practical guide usually saves time. That combination helps separate simple replacement orders from jobs that still need fit or application review.
Why keep a supporting guide linked beside RLS28 and 8221?
Because it makes later decisions faster. When sizing notes, application cues, and nearby options stay close to the product, engineering, purchasing, and maintenance teams can revisit the same logic without starting the review from zero.
Shipping Method:
1. Sea shipping for mass cargos (GW > 500KGS)
2. Air shipping (GW between 100KGS – 500 KGS)
3. Express, such as DHL, TNT, Fedex, UPS for small cargos ( GW < 100KGS)
4. If you have shipping agent in China, we can send goods to your shipping agent's warehouse
Payment Terms:
We accept T/T, W/U, PAYPAL, L/C etc
Buyer FAQ
Questions buyers ask before choosing the next bearing option
What should I confirm before ordering RLS28 Bearing LJ3.1/2 Single Row Ball Bearings LS 20 3.5” Bore?
Confirm the bearing number, bore size, outside diameter, width, seal or shield type, cage material, clearance, precision level, quantity, and application. These details help prevent a size match from becoming a performance mismatch.
Can this bearing be matched for replacement or repeat supply?
Yes. Replacement and repeat orders are easier when the original marking, measured dimensions, photos, application, and quantity are available. If the marking is unclear, the team can start from the size and working condition.
Which product family does this bearing belong to?
This item is handled within the Deep Groove Ball Bearings family. Comparing the family page can help buyers review similar sizes, seal options, load direction, and related bearing choices before requesting a quote.
What affects price and lead time for this bearing?
Price and lead time can change with quantity, stock availability, precision grade, clearance, material, cage, seal or shield type, lubrication, packaging, and whether the order needs standard matching or custom production.
How is this bearing checked before delivery?
Inspection can include material review, dimensional measurement, noise and vibration checks, surface and crack checks, visual review, and packaging inspection according to the confirmed order requirements.
Need help checking fit, price, or lead time? Request a bearing quote
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