d: 127mm/ 5 in
D: 228.60mm/ 9 in
B: 34.925mm/ 1.375 in
Mass: 5.52kg/ 12.17lb
Seal: Open without seal
Radial Internal Play: standard CN
Precision: ABEC1, P0
Warranty: 1 year
RLS40 bearing is inch single row deep groove ball bearing.
d: 127mm/ 5 in
D: 228.60mm/ 9 in
B: 34.925mm/ 1.375 in
Mass: 5.52kg/ 12.17lb
Seal: Open without seal
Radial Internal Play: standard CN
Precision: ABEC1, P0
Warranty: 1 year
Operating Temperature: -30 °C to 120 °C
Replacements: RLS-40, RLS 40, LS23, LS 23, LS-23, LJ5E, LJ5
1.Imperial bore sizing
RLS-40 bearing uses inch dimensions (RLS series) for direct replacement in legacy or North American/UK designed equipment without shaft re-machining or sleeves.
2. High-quality bearing steel
LS23 bearings are manufactured from high carbon chromium steel (AISI 52100 / 100Cr6) for high hardness, fatigue resistance, and dimensional stability.
3. Precision raceway finishing
Smooth raceways lower friction, reduce noise and vibration, and support efficient running in electric motors and general machinery.
4. Interchangeable across brands
Conforms to widely recognized RLS dimensional conventions, enabling cross-reference with major bearing manufacturers for easy sourcing.
| Bearing Model Number | Dimension (Inch) | Mass | |||
| d | D | B | KG | ||
| LJ3 3/8 | RLS27 | 3 3/8 | 7 1/2 | 1 9/16 | 4.9 |
| LJ3 1/2 | RLS28 | 3 1/2 | 6 1/2 | 1 1/8 | 2.33 |
| LJ3 3/4 | RLS30 | 3 3/4 | 6 3/4 | 1 1/8 | 2.47 |
| LJ4E | RLS32 | 4 | 7 1/4 | 1 1/4 | 3.18 |
| LJ4 1/4 | RLS34 | 4 1/4 | 7 1/2 | 1 1/4 | 3.86 |
| LJ4 1/2 | RLS36 | 4 1/2 | 8 | 15/16 | 4.67 |
| LJ4 3/4 | RLS38 | 4 3/4 | 8 1/4 | 15/16 | 4.9 |
| LJ5E | RLS40 | 5 | 9 | 1 3/8 | 6.35 |
| LJ5 1/2 | RLS44 | 5 1/2 | 9 1/2 | 1 3/8 | 6.85 |
| LJ6E | RLS48 | 6 | 10 1/2 | 1 9/16 | 9.48 |
| LJ6 1/2 | RLS52 | 6 1/2 | 11 | 1 9/16 | 10.2 |
| LJ7E | RLS56 | 7 | 12 | 1 3/4 | 14.1 |
| LJ7 1/2 | RLS60 | 7 1/2 | 12 1/2 | 1 3/4 | 14.5 |
| LJ8E | RLS64 | 8 | 13 | 1 3/4 | 15.6 |
| LJ8 1/2 | RLS68 | 8 1/2 | 14 | 2 | 21.1 |
| LJ9E | RLS72 | 9 | 14 1/2 | 2 | 22 |
| LJ9 1/2 | RLS76 | 9 1/2 | 15 1/8 | 2 | 22.7 |
| LJ10E | RLS80 | 10 | 15 3/4 | 2 | 25.5 |
| LJ10 1/2 | RLS84 | 10 1/2 | 16 5/8 | 2 1/4 | 32.5 |
| LJ11E | RLS88 | 11 | 17 1/2 | 2 1/2 | 36.1 |
| LJ11 1/2 | RLS92 | 11 1/2 | 18 | 2 3/8 | 38.5 |
| LJ12E | RLS96 | 12 | 18 1/2 | 2 5/8 | 44.5 |
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.
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.
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.
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.
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
We accept T/T, W/U, PAYPAL, L/C etc
Buyer FAQ
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.
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.
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.
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.
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
No account yet?
Create an Account
