4.054 Combined Bearings MR0021 Heavy Duty Roller Bearing 30*62*42
d: 30mm
D: 62mm
T: 42mm
H: 37.5mm
Weight: 0.53kg
Bolt tolerance: –0.05 mm
Outer ring: Case-hardened steel UNI 20 MNCr 5
Inner ring: Hardened steel En 31 – SAE 52100
Alternative Number: 4.054, MR0021, MR 0021, MR-0021, MR0001, MR 0001, etc.
4.054 Combined Bearings Specification:
4.054 combined bearings are widely used in froklift trucks, cranes and hoists and so on.
For this bearing,
d: 30mm
D: 62mm
T: 42mm
H: 37.5mm
Weight: 0.53kg
Bolt tolerance: –0.05 mm
Outer ring: Case-hardened steel UNI 20 MNCr 5
Inner ring: Hardened steel En 31 – SAE 52100
Structure: Combined bearing, combination bearing, high load cam followers
Alternative Number: 4.054, MR0021, MR 0021, MR-0021, MR0001, MR 0001, etc.
MR0021 Roller Bearing Photo:
Composite Roller Bearing Size Chart：
| Model Number | D | H | h | d | T | B | S |
| 4.053 | 52.5 | 33 | 27 | 30 | 40 | 17 | 15 |
| 4.054 | 62 | 37.5 | 30.5 | 30 | 42 | 20 | 20 |
| 4.054 | 62.5 | 37.5 | 30.5 | 30 | 42 | 20 | 20 |
| 4.055 | 70.1 | 44 | 36 | 35 | 48 | 23 | 22 |
| 4.056 | 77.7 | 48 | 36.5 | 40 | 54 | 23 | 24 |
| 4.057 | 77.7 | 40.7 | 29 | 40 | 54 | 23 | 24 |
| 4.058 | 88.4 | 57 | 44 | 45 | 59 | 30 | 18 |
| 4.059 | 101.2 | 46 | 33 | 50 | 67 | 28 | 30 |
| 4.06 | 107.7 | 53 | 39 | 55 | 7 | 31 | 34 |
| 4.061 | 107.7 | 69 | 55 | 60 | 71 | 31 | 34 |
Contact Us:
For common combination bearing models, we have large stock.
There are so many bearing models. Therefore, it’s impossible for us to upload all bearing models.
If you don’t find your bearing model numbers on our website, pls feel free to contact us !
Professional Bearing Solution Expert & Your Thrustworthy Partner
Jinan TOP Bearing Co., Ltd
Add: 1-2405-4, No. 1825, Hualong Rd., Licheng Dist, Jinan, Shandong, China
Mobile/WhatsApp/Wechat: +8615662712802
Email: supersales@jntopbearing.com
Questions that usually come up before ordering MR0021
When is MR0021 worth comparing against nearby other ball & roller 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 MR0021 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 MR0021 is shortlisted?
A quick review of Other Ball & Roller 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 MR0021?
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 4.054 Combined Bearings MR0021 Heavy Duty Roller Bearing 30*62*42?
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 Other Ball & Roller 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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