NTN HMK3845ZWD needle roller bearing

NTN HMK3845ZWD belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for HMK3845ZWD and any equivalents.

For equipment where the housing bore is limited but radial loads are substantial, the NTN HMK series provides a caged needle roller bearing solution. These bearings are common in transmissions, pumps, compressors and textile machinery. MR Industrial Accessories LLC supplies the HMK series to customers throughout the United States and Latin America.

The HMK part number itself tells you the size. The letters HMK mark the series, and the following digits give the bore and outer diameter in millimeters. For instance, HMK3845ZWD has a 38 mm bore and a 45 mm outer diameter; HMK4040ZWD has a 40 mm bore and a 40 mm outer diameter; HMK4540ZWD has a 45 mm bore and a 40 mm outer diameter. The ZWD suffix means the bearing includes a double sealing lip, which keeps contaminants out and helps retain lubricant.

You will find these bearings in gearboxes, water and oil pumps, compressors, machine tools and transmission equipment. Their compact cross-section allows them to replace ball bearings where more radial capacity is needed. In heavy machinery maintenance and continuous production environments, they are a practical choice when space is tight.

When selecting an HMK bearing, confirm the shaft diameter, the available outer diameter and the width. Check whether the ZWD seal suits the working conditions; in dusty or damp areas, the double lip offers extra protection. Use a suitable press or puller for mounting, and avoid striking the needles directly. Shaft and housing alignment must be accurate to prevent unwanted axial loads. Grease or oil lubrication can be used, depending on speed and temperature.

NTN HMK series bearings can be interchanged with equivalent products from other manufacturers that follow the same dimensional system. For a replacement, compare bore, outer diameter, width and seal type. If you have a part number from another brand or an unidentified bearing, MR Industrial Accessories LLC can identify the compatible equivalent. Interchange works when dimensions and required load capacity align.