HK 4212 Needle Bearing HK Series High Precision

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1 set
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1000000 set/month

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Product Description:

Product Specifications:



Brand Name:


Bore Size:

42 mm

Outside Diameter:

49 mm

Model Number:

HK 4212

Precision Rating:


Seals Type:

Open or Sealed

Number of Row:

Single Row

Place of Origin:

Jiangsu, China (Mainland)


Chrome Steel


Grease Lubrication


Plastic Bag and Box


HK 4212

Drawn Cup Needle Roller Bearing :

The outer ring of drawn cup needle roller bearing is punched with the high-quality steel sheet. The outer ring has thin wall.The drawn cup needle roller bearing has the characterstics of small radial section area, large load carring capacity ,less inertia and economic manufacture. It is suitable for small section heght, or when the housing bore isnot used for raceway , this type is recommended to use .The bearing is assembled into the housing bore under a certain pressure without fu rther axial location.


The draw up needle roller bearing generally takes its shaft diameter as the internal raceway .However , the proper LR type inner ring can be  used in accordance with application condition.

Our Advantages:

1. Excellent and high quality control

2. Prompt delivery

3. Competitive price

4. Small order accepted 

5. Customers' drawing or samples accepted

6. OEM service

Application Area:

Needle roller bearings are mainly used in car engines, transmissions, compressors, cranes, etc.



1.More than 28 years export experience

2.Strict quality control

3.Delivery in time

4.OEM service are available with good price

5.Low MOQ

HK 4212 Needle Bearing HK Series High Precision

HK 4212 Needle Bearing HK Series High Precision

HK 4212 Needle Bearing HK Series High Precision

HK 4212 Needle Bearing HK Series High Precision

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Q:how long do your bearings spin?
2mins reds a couple of months no
Q:Do cars have wheel barrens or wheel bearings?
I've never heard of wheel barrens except for my son in-law's terrible Long Island English who might pronounce bearings as barrens. Every one else is correct it's wheel bearings.
Q:Skating question about bearings and wheels?
you didn't get the bearings seated in the wheels correctly. Take the wheels off the trucks slide one wheel back on the axle press firmly and evenly to seat the bearing. You might need someone who can give it a bit more muscle flip the wheel over and repeat. do this for all 4 wheels. If there still is a problem, take them to a skate shop. They have a bearing press that can install the bearings.
Q:Rear shock absorber causing premature wear on bearings?
the shaft,s that your bearing,s go onto at the shock are worn you will never get the bearing tolerance's right afraid as it,s a 98 motor, if you can run to it replace both rear shocks and repack bearing,s it will cost a fair bit of money so give it some serious thinking you could use some of that cash for a newer car
Q:is line boring an engine block necessary? or should you just replace the bearings ?
A good machinist can check the crank bearing bore for alignment with a straight edge. You can also tell when disassembling an engine by looking at the existing bearings and their wear pattern. If the block is straight line boring is a waste of money and a possible new source of problems if it is done incorrectly. If you still have the bearings marked, line them up and look at the wear, if not have the block checked by an experienced machinist who already has plenty of work. Not always but many times line boring is an upsale for shops looking for more profits. It isn't needed very often.
Q:what solvents are good for cleaning skateboard bearings?
Honestly... unless you have very good bearings, the best thing youc an do is toss them and get a new set. Most bearings are inexpensive and rather cheaply made. If you are using something like bones swiss, then take care of them and they can last for years. What do I use to clear my swisses? Gasoline. Its dangerous, but nothing works better. Honestly, just get a new set if you are riding cheap bearings.
Q:What prices am I looking at for full ceramic bearings?
Assuming you are looking for not only ceramic balls, but inner and outer races as well. These bearings will run around $240 a set. Most bearings that called ceramic only use ceramic balls, but the races are still steel. Some cheaper 'ceramic' bearings only use a ceramic coating on the balls. You might want to think about stainless steel bearings. They are very resistant to corrosion and cost much less than full ceramic bearings, and only a little more than regular steel. SS Bearings with ceramic balls cost about double that of all SS bearings.
Q:If I put loose bearings in my bottom bracket how much space am I supposed to leave?
none of this is going to help you so many bad questions missing info conundrums canards shibboleths
Q:How can i clean my skateboarding bearings?
Look it up on youtube and it will be easier to follow bc it is a visual video, Compared to writting on here.
Q:how many ball bearings can i jam into my eurethra?
I would probably say around 3-4 (Small Ball Bearings) if i was in your currant situation i would use Vaseline to lube up your Urethra first this also will make the skin slightly more flexable inside and arround the Uethra, It could also be a good idea to measure the size of the Initial hole/opening and only putting ball bearings down there which you are comfortable with. When trying to extract the Ball Bearing i would put slight pressure on the Uethra behind ALL the Ball Barings and trying to slowly but comfortably squeeze them back out. If you cann'ot squeeze ALL the Ball'Bearings out after a few tries you should go to the Closest Hospital and tell them your EXACT situation.

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