China OEM Rn309m Cylindrical Roller Bearing Brass Cage Eccentric Bearing Rn309m shaft collar alternatives

Product Description

Product Description

Cylindrical roller bearings without outer ring capped edge

The NU cylindrical roller bearing has double capped edges on outer ring and without capped edge on inner ring 

The N cylindrical roller bearing has double capped edges on inner ring and without capped edge on outer ring 

The NU and N cylindrical roller bearings, the shaft is allowed two-way displacement toward the bearing box, i.e. the cylindrical roller bearings can bear the change of shaft length due to thermal expansion. Thus It is suitable to serve as a non-fixed bearing. It can bear larger radial load, but cannot take axial load.


Cylindrical roller bearings with capped edge on both outer ring and inner

The NJ cylindrical roller bearing has double capped edge on outer ring and single capped edge on inner ring. 

The NF cylindrical roller bearing with the single capped edge on outer ring & double capped edges on inner ring 

The NJ & NF cylindrical roller bearing, the axial-displacement of the shaft or housing on one-direction can be limited. The one-direction axial positioning can be reached. It can burden smaller axial load from one-direction. 

The NUP cylindrical roller bearing with double capped edges on the outer ring & with capped edge on 1 side of the inner ring, as well as with inner ring loose rib on the other side of the inner ring. The two-way axial positioning toward the shaft can be reached. The bearing can bear two-way axial force. The NUP & N cylindrical roller bearings can be chosen for the structure. The NJ and HJ cylindrical roller bearing with separate thrust collar is similar to the NUP cylindrical roller bearing, it can be used as the fixed (positioning) bearing.


Cylindrical roller bearings without inner ring or without outer ring

The RNU cylindrical roller bearing has an outer ring with double capped edges but does not come with inner ring. Such bearing is the NU cylindrical roller bearings without the inner ring 

The RN cylindrical roller bearing has an inner ring with double capped edge but does not come with outer ring. 

The RNU and RN cylindrical roller bearing are used with a component having a limitation on radial dimension. The axial journal or the surface of the housing bore can be used as the raceways. The hardness and the machining precision as well as the surface quality should be same as the raceways of the inner ring and the outer ring.

Boundary dimensions(mm)  
d 70
D 150
B 34
rs min 2.1
rs1 min 2.1
Basic load ratings(kN)  
Cr 206
Cor 225
Limiting speed(rpm)  
Grease 4200
Oil 5000
(Refer.) 3.1



Bearing No. Dimensions (Metric) Approx. Interchange
d F D B Wgt. lbs              
   NU-301 12 18.5 37 12 0.17 NU 301 R 312 E NU 301 NU 301
   NU-302 15 21 42 13 0.23 NU 302 R 315 E NU 302 NU 302
   NU-303 17 25.1 47 14 0.3 NU 303 R 317 E A 1303 TS NU 303 NU 303
   NU-304 20 28.5 52 15 0.37 NU 304 R 320 E A 1304 TS MUC 304 NU 304 NU 304
   NU-305 25 35 62 17 0.62 NU 305 R 325 E A 1305 TS MUC 305 NU 305 NU 305
   NU-306 30 42 72 19 0.92 NU 306 R 330 E A 1306 TS MUC 306 NU 306 NU 306
   NU-307 35 46.2 80 21 1.2 NU 307 R 335 E A 1307 TS MUC 307 NU 307 NU 307
   NU-308 40 53.5 90 23 1.67 NU 308 R 340 E A 1308 TS MUC 308 NU 308 NU 308
   NU-309 45 58.5 100 25 2.19 NU 309 R 345 E A 1309 TS MUC 309 NU 309 NU 309
   NU-310 50 65 110 27 2.89 NU 310 R 350 E A 1310 TS MUC 310 NU 310 NU 310
   NU-311 55 70.5 120 29 3.6 NU 311 R 355 E A 1311 TS MUC 311 NU 311 NU 311
   NU-312 60 77 130 31 4.61 NU 312 R 360 E A 1312 TS MUC 312 NU 312 NU 312
   NU-313 65 83.5 140 33 5.64 NU 313 R 365 E A 1313 TS MUC 313 NU 313 NU 313
   NU-314 70 90 150 35 6.86 NU 314 R 370 E A 1314 TS MUC 314 NU 314 NU 314
   NU-315 75 95.5 160 37 8.13 NU 315 R 375 E A 1315 TS MUC 315 NU 315 NU 315
   NU-316 80 103 170 39 9.84 NU 316 R 380 E A 1316 TS MUC 316 NU 316 NU 316
   NU-317 85 108 180 41 11.34 NU 317 R 385 E A 1317 TS MUC 317 NU 317 NU 317
   NU-318 90 115 190 43 13.45 NU 318 R 390 E A 1318 TS MUC 318 NU 318 NU 318
   NU-319 95 121.5 200 45 15.56 NU 319 R 395 E A 1319 TS MUC 319 NU 319 NU 319
   NU-320 100 129.5 215 47 19.34 NU 320 R 400 E A 1320 TS MUC 320 NU 320 NU 320 100 RU 03
   NU-321 105 135 225 49 22 NU 321 R 405 E A 1321 TS MUC 321 NU 321 NU 321 105 RU 03
   NU-322 110 143 240 50 26.23 NU 322 R 410 E A 1322 TS MUC 322 NU 322 NU 322 110 RU 03
   NU-324 120 154 260 55 32.78 NU 324 R 420 E A 1324 TS MUC 324 NU 324 NU 324 120 RU 03
   NU-326 130 167 280 58 41.11 NU 326 R 430 E A 1326 TS MUC 326 NU 326 NU 326 130 RU 03
   NU-328 140 180 300 62 49.45 NU 328 R 440 E MUC 328 NU 328 NU 328 140 RU 03
   NU-330 150 193 320 65 66.11 NU 330 R 450 E MUC 330 NU 330 NU 330 150 RU 03
   NU-332 160 208 340 68 79.89 NU 332 MUC 332 NU 332 NU 332 160 RU 03
   NU-334 170 220 360 72 94.78 NU 334 MUC 334 NU 334 NU 334 170 RU 03
   NU-336 180 232 380 75 108.34 NU 336 MUC 336 NU 336 NU 336 180 RU 03
   NU-338 190 245 400 78 123.34 NU 338 MUC 338 NU 338 NU 338 190 RU 03
   NU-340 200 260 420 80 140 NU 340 MUC 340 NU 340 NU 340 200 RU 03
   NU-344 220 284 460 88 190 NU 344 MUC 344 NU 344 NU 344 220 RU 03
   NU-348 240 310 500 95 242.22 NU 348 MUC 348 NU 348 NU 348 240 RU 03
   NU-352 260 336 540 102 302.22 NU 352 MUC 352 NU 352 NU 352 260 RU 03
   NU-356 280 362 580 108 368.89 NU 356 MUC 356 NU 356 NU 356 280 RU 03
   NU-360 300 388 620 109 372.577 NU 360 MUC 360 NU 360 NU 360 300 RU 03

Detailed Photos



Q: Why did you choose us?

A. We provide the best quality bearings with reasonable price, low friction, low noise and long service life.

B. With sufficient stock and fast delivery, you can choose our freight forwarder or your freight forwarder.

C. The best service provided by a well-trained international sales team.

Q: Do you accept small orders?

Surely, once your bearings are standard size bearings, even one, we will also accept.

Q: How long is your delivery time?

Generally speaking, if the goods are in stock, it is 1-3 days. If the goods are out of stock, it will take 6-10 days, depending on the quantity of the order.

Q: Do you provide samples? Is it free or extra?

Yes, we can provide a small amount of free samples. Do you mind paying the freight?

Q: What should I do if I don’t see the type of bearings I need?

We have too many bearing series numbers. Sometimes we can’t put them all on web. Just send us the inquiry and we will be very happy to send you the bearing details.

Welcome to contact me anytime!

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Medium and Large(120-190mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing
US$ 18/Piece
1 Piece(Min.Order)

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Shaft Collar

Types of Shaft Collars

Quick-clamp shaft collars

Quick-clamp shaft collars are a convenient option for tightening and loosening shafts. Unlike traditional bolts, quick clamps do not require any tools to install and adjust them. These collars come with flush handles and are designed to reduce production downtime. They also feature high-strength tension adjustment screws for compatibility with a wider range of shaft tolerances.
Quick-clamp shaft collars are offered in a variety of styles. CZPT, for example, offers a unique style of quick-clamp shaft collars with an integral lever. This lever sits flush against the outside diameter and is finger actuated. In addition, this design includes a tension-adjustment screw that can be adjusted according to the application’s requirements. Another style of quick-clamp shaft collar is a one-piece clamping collar with an integrated handle. It is ideal for low-rpm applications, and is designed to be a quick and simple solution for frequent shaft changeovers.
Quick-clamp shaft collars have an adjustable locking force generated by an eccentric lever and are very easy to install. They are available in one and two-piece clamp-type styles, and come in more than thirty standard sizes. They are available with round, square, and threaded bores. Additionally, you can choose to have them painted or customized.

Single split shaft collars

Single split shaft collars are a common choice for new installations. They provide easy installation and disassembly, which helps to minimize labor and downtime. They are also designed with full seating torque of the set screws, which evenly distributes forces throughout the shaft circumference. As a result, they provide greater holding power.
These shaft collars are available in various materials. They are typically made from different types of steel, including stainless steel and aluminium steel. They can also be made from nylon. The latter is available with different finishes, including black oxide. These are also available in custom sizes. These shaft collars are made to fit specific applications.
Single split shaft collars are available in a variety of sizes to fit a wide range of shaft diameters, from 1/8″ to 4 15/16″. The material used for the shaft should be softer than the material used for the set screw. They are marked with the bore size and are available in non-plated, chrome-plated, and black oxide coated materials.
Heavy-duty shaft collars are designed to hold a large amount of torque. They are available in two-piece clamp and one-piece clamp styles and offer up to 25 percent more holding force than standard collars. They are also available in a variety of materials, including proprietary black oxide finish, 1215 lead-free steel, 303 stainless steel, and high-strength 2024 aluminum.
Single split shaft collars are generally easy to install and remove. The design of these collars allows the shaft to fit into it evenly, which improves holding power. They also eliminate the need to remove or disassemble other components of the shaft. Additionally, they are easy to adjust and can work with virtually any shaft.
Single split shaft collars come in two-piece and one-piece styles. One-piece shaft collars are simpler to install and do not damage the shaft. Clamp-style collars are easy to use and do not require tools. They are designed to be hand-adjustable. These collars are recommended for light-duty applications. They are available in a wide range of threaded bore sizes. They also come in various styles, including ring-style and set-screw collars.
Shaft Collar

Set-screw shaft collars

Set-screw shaft collars are made of different materials, including steel, aluminum, and zinc plated steel. They are available in various widths and sizes. They can be used in aerospace, defense, and construction applications. Some types are standard, while others are custom-made.
A shaft collar has three primary functions: it holds a component in place, locates the component on a shaft, and creates an attachment between the shaft and another component. The design of a shaft collar depends on several factors, including the material, diameter, and geometry of the shaft.
One of the most common uses of shaft collars is to secure bearings and sprockets to shafts. In some cases, they also act as mechanical stops. For example, a two-piece clamp collar will wrap around the shaft without leaving any marks, while a set-screw collar will lock onto a shaft with a set screw. These types of collars can be used on predrilled and soft shafts.
Another advantage of set screw shaft collars is that they can be manufactured in a lightweight style for space-constrained applications. Another benefit is their ability to hold twice as much load as standard shaft collars. These collars are also available with a keyway, which makes them suitable for shafts with a key.
Another advantage of set-screw shaft collars is their safety. They were invented in the recessed socket screw industry and have become an industry standard. They prevent the shaft from sliding and causing a flanged bearing to come out. They are easy to install and remove, and they are ideal for light-duty applications.
Clamp style shaft collars are also available in one-piece and two-piece designs. This type of collar is unique in that it can be removed without damaging the shaft. They are also adjustable and can fit virtually any shaft. Their clamping force is evenly distributed around the shaft, so they are significantly safer than set screw collars, which use point-contact clamps.
Shaft Collar

Hinge shaft collars

The International series is a two-piece shaft collar with metric outer diameters, metric widths, and inch bores. These collars are suitable for many different types of applications, and are available in a variety of materials and bore sizes. They are available in 1215 lead-free steel with black oxide finish, high strength 2024 aluminum, and 303 stainless steel.
Custom Hinged Shaft Collars are a great choice for applications requiring quick and easy adjustment, especially in remote locations. They are available in a variety of materials, including steel, stainless steel, aluminum, and brass. You can even get custom-made collars for unusually shaped shafts.
Hinge shaft collars are similar to two-piece shaft collars in many ways. They allow easy disassembly and reassembly along the shaft and are usually the preferred choice in harsh environments. Hinge shaft collars have a simple design, allowing them to be installed quickly and easily. They also provide superior holding power. If you’re considering a hinge shaft collar for your application, it is important to consider how it will be used.
Hinge shaft collars serve as precise stops and spacers for different laboratory equipment. They can also be used on plastic, glass, and thin-walled tubes. They are often used in medical equipment, where the need for accuracy is paramount. They also serve as guides in optical measuring instruments. They are also useful in trucks and off-road vehicles, where they serve as mechanical stops.
Hinge shaft collars can be purchased in two-piece or one-piece designs. They can be adjusted using a single screw or lever. They can be installed and removed without causing any damage to the shaft. Unlike set screw collars, they don’t require tools. This makes them ideal for applications where access to the shaft is difficult or impossible. The advantages of these collars include improved safety and security.
China OEM Rn309m Cylindrical Roller Bearing Brass Cage Eccentric Bearing Rn309m   shaft collar alternativesChina OEM Rn309m Cylindrical Roller Bearing Brass Cage Eccentric Bearing Rn309m   shaft collar alternatives
editor by CX 2023-11-14

locking collar

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