NTN 6AS09-1.1/4D1 insert bearing

NTN 6AS09-1.1/4D1 is a reference of insert bearing, within Bearings. Request a quote for 6AS09-1.1/4D1 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The NTN AS series insert bearing is a ball bearing with an extended inner ring, designed to be mounted in split plummer block housings and bearing units. It is used in equipment that requires smooth rotation with simple alignment, such as conveyor belts, fans and agricultural machinery. MR Accesorios Industriales sells this line in Buenos Aires, Argentina, and helps you identify the exact size from the code stamped on the part.

The AS series designation is read in blocks: the first number indicates the type of inner ring locking, the letters AS correspond to the series, and the number that follows is linked to the shaft diameter. The suffixes express the bore diameter in inches and fractions, and the final letter D indicates sealing or insert configuration variants. That is why, when ordering an insert, it is best to provide the complete code: each block changes the fit on the shaft.

These inserts are mounted in split plummer block housings and bearing units found in food plants, material handling, mills, water treatment plants and agricultural equipment. In Argentina they are common in conveyor belts, bucket elevators, mixers and industrial fans. The combination of insert plus split plummer block housing allows the assembly to be removed without dismantling the shaft, which is very practical in maintenance of lines that cannot stop for long.

To choose correctly, first look at the shaft diameter and the type of inner ring locking: there are versions with set screws, with eccentric ring or with adapter sleeve. Then check the sealing: an insert with a contact seal protects better against dust and moisture than an open one. During mounting, make sure the housing sits flat and the shaft is aligned with the drive; poor alignment shortens bearing life. Factory lubrication is usually enough for several seasons, but in dirty environments relubrication should be scheduled.

As for equivalents, NTN AS series inserts can replace other extended inner ring insert lines with the same shaft and housing dimensions. Interchangeability is not automatic: bore diameter, overall width, set screw location and sealing type must be compared. If you have another brand's code, send it along with the shaft size and housing dimensions, and we will tell you the compatible NTN alternative or the one that best fits your equipment.

If you need to replace an insert for a bearing unit, send the complete code by WhatsApp to MR Accesorios Industriales. With that information and a photo of the part we will quote the exact reference and get it to you shortly. We can also advise you if the code is worn off and you only have the shaft and housing dimensions.