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This section provides an overview for adapter nuts as well as their applications and principles. Also, please take a look at the list of 11 adapter nut manufacturers and their company rankings. Here are the top-ranked adapter nut companies as of February, 2025: 1.MurCal, 2.G.W. Kent, Inc., 3.SIGMAKOKI CO.,LTD..
Table of Contents
Adapter nuts are specialized components used in conjunction with adapter sleeves and lock washers, collectively known as adapters. These components are essential in the installation and maintenance of spherical ball bearings and spherical roller bearings, particularly those with tapered bores in their inner rings. Adapter nuts facilitate easy mounting, dismounting, and securing of these bearings.
These nuts, often synonymous with bearing nuts and lock nuts, feature a female thread on the inside diameter. The outside diameter is designed with 4 to 8 notches evenly spaced around the circumference, allowing for the use of specialized tools for tightening and loosening.
Adapter nuts are primarily used for securing the inner rings of spherical ball bearings and spherical roller bearings onto shafts. They are crucial in ensuring these bearings are fixed in position, which is particularly important in applications such as angular contact ball bearings. Here, adapter nuts, along with lock washers, are used to firmly attach the bearings to the shaft. Tightening and adjustments are typically done using a wrench with a special hook or a socket tool designed to fit the nut's notches.
The Adapter Nut functions by securing the bearing to the shaft. The adapter itself has a tapered outer diameter, with a smaller hole at the side where the nut is installed and a larger hole on the opposite side. The bearing's inner diameter also has a corresponding tapered hole. When the Adapter Nut is turned and tightened, it pushes the bearing's inner ring inward, tightening the fit between the adapter's outer diameter and the bearing's inner diameter, thus securing the bearing in place. A lock washer, positioned between the adapter nut and bearing inner ring, has outer teeth that align with the notches in the adapter nut. These teeth are bent into the notches to prevent the bearing from rotating or loosening.
*Including some distributors, etc.
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3M Company was founded in 1902 and is headquartered in St. Paul, Minnesota. 3M provides diversified technology services globally. 3M operates through four segments: Safety and Industrial, Transportation and Electronics, Health Care, and Consumer. The Safety and Industrial segment offerings include industrial abrasives, masking, and natural and color-coated mineral granules for shingles. The Transportation and Electronics segment offerings include ceramic solutions, light management films, and electronics assembly solutions. The Healthcare segment offerings include wound care, dentistry and orthodontia solutions, and filtration and purification systems. The Consumer segment offerings include consumer bandages, picture hanging, and stationery products.
Weiler Abrasives, Inc, founded in Pforzheim, Germany., in 1879 is a manufacturer of coated abrasives, bonded abrasives and power brushes. The company's product portfolio includes Cutting Wheels, Grinding Wheels, Artificial Abrasives, Technical Fabrics and Superabrasives. Their products are used in industries such as Food and Beverage, Pharmaceutical and Biotechnology, Chemical and Petrochemical, Environmental Testing and healthcare. In 1886 the company moved its production site to its current location in Maribor in Slovenia.
SIGMAKOKI Co., Ltd. (SK) is a Japanese manufacturer and distributor of optical technology products founded in 1977. Headquartered in Tokyo, the company offers a wide range of optical equipment including optics and optical coatings, laser and optical application system components, objective lenses, and biomedical products such as core units for microscopy. It primarily serves research institutes, as well as clients in the aerospace, semiconductor, and medical device manufacturing sectors. SK products have various applications including in laser processing, R&D, spectroscopic measurement, and optical communication.
Ranking as of February 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | MurCal |
25.0%
|
| 2 | G.W. Kent, Inc. |
25.0%
|
| 3 | SIGMAKOKI CO.,LTD. |
25.0%
|
| 4 | 3M |
25.0%
|
Derivation Method
The ranking is calculated based on the click share within the adapter nut page as of February 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 44.4% |
|
Japan
|
2 | 22.2% |
|
United Kingdom
|
2 | 22.2% |
|
Slovenia
|
1 | 11.1% |
187 products found
187 products
Global Parts Co., Ltd.
210+ people viewing
Last viewed: 2 hours ago
YSA lock nuts are designed to tighten the shaft from three points in the axial direction, making them suitable for environments that require specia...
10 models listed
Global Parts Co., Ltd.
280+ people viewing
Last viewed: 20 minutes ago
YSR lock nuts are designed to tighten the shaft from three points in the radial direction. This lock nut is thinner than other types, so it can be ...
10 models listed
Global Parts Co., Ltd.
170+ people viewing
Last viewed: 19 hours ago
YSF lock nuts are designed to tighten the shaft from three locations diagonally (30 degrees) to the thread. This superior tightening method provide...
10 models listed
Global Parts Co., Ltd.
210+ people viewing
Last viewed: 2 hours ago
M-YSA lock nuts are designed to tighten the shaft from three points in the axial direction, making them suitable for environments that require spec...
10 models listed
Takeda Shoji Co., Ltd.
90+ people viewing
Last viewed: 17 hours ago
■World's thinnest lock nut Adopts a unique locking mechanism to achieve highest class locking force with a single nut. ■ Uniform locking from all ...
Shinken Precision Co., Ltd.
150+ people viewing
Last viewed: 5 hours ago
A lock nut with a simple structure. Set piece construction not included. The threaded part of the nut and the tightening end face are simultaneous...
Global Parts Co., Ltd.
240+ people viewing
Last viewed: 2 hours ago
The M-YSR lock nut tightens the shaft from three points in the radial direction. The thickness (h) of this lock nut is thinner than other types, so...
10 models listed
Shinken Precision Co., Ltd.
150+ people viewing
Last viewed: 4 minutes ago
This is a type where the 3 set pieces are tightened from the end side of the nut instead of from the outer periphery. The adhesion of the set piece...
Global Parts Co., Ltd.
190+ people viewing
Last viewed: 2 hours ago
The M-YSF lock nut is designed to tighten the shaft from three locations diagonally (30 degrees) to the thread. This superior tightening method pro...
10 models listed
Shinken Precision Co., Ltd.
140+ people viewing
Last viewed: 1 day ago
Both a wrench and a spanner can be used for tightening. It comes with 3 set pieces and is easy to use. The threaded part of the nut and the tighte...
Fuji Precision Co., Ltd.
600+ people viewing
Last viewed: 10 hours ago
■Features ・Reusable ・Fine adjustment is possible at any position, and torque management is also easy. ・No need for toothed washer or shaft keywa...
10 models listed
Shinken Precision Co., Ltd.
120+ people viewing
Last viewed: 1 day ago
This type has a nut width thicker than SWT/R, ensuring a sufficient number of thread grooves. The set piece is tilted 30 degrees to the radial dire...
Shinken Precision Co., Ltd.
120+ people viewing
Last viewed: 5 hours ago
This type has a split nut structure with 4 to 6 set screws on the end face of the nut. Suitable for severe applications such as high rotational acc...
YTK
60+ people viewing
Last viewed: 11 hours ago
Standard Response
■Summary High quality made in Taiwan ■Type ・Precision polished lock nut ・Precision cutting lock nut
TOAMEC Co., Ltd.
110+ people viewing
Last viewed: 20 minutes ago
Standard Response
5.0 Company Review
Hardlock nuts consist of two types of nuts: convex and convex. By combining a convex nut with eccentric machining and a concave nut with perfect ci...
Shinken Precision Co., Ltd.
130+ people viewing
Last viewed: 6 hours ago
It has a split nut structure with 6 set screws placed on the end face. The set screw elastically deforms the split nut and strongly prevents it fro...
Tatsuta Co., Ltd.
110+ people viewing
Last viewed: 1 hour ago
4.5 Company Review
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). - 3 hook spanner grooves.
Tatsuta Co., Ltd.
90+ people viewing
Last viewed: 22 hours ago
4.5 Company Review
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). ・Hook spanner type. ■Applications Precision spindles ...
Tatsuta Co., Ltd.
100+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features ・Fix 3 set screws from the axial direction. ・Pin spanner type.
Tatsuta Co., Ltd.
90+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features - Axial force and preload can be easily adjusted. - Resistant to vibration, allows for precision adjustment and strong fastening. █Appli...
Tatsuta Co., Ltd.
100+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features ・Fix 3 set screws at 60° from the circumferential direction. - 4 hook spanner grooves. ・With 2-chamfer processing (M80 or less). █Appl...
Tatsuta Co., Ltd.
100+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features ・Fix 3 set screws at 60° from the circumferential direction. - 3 hook spanner grooves.
Tatsuta Co., Ltd.
70+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features ・Fix 3 set screws at 30° from the circumferential direction. ・Pin spanner type. █Applications Precision spindles for machine tools, ba...
Tatsuta Co., Ltd.
100+ people viewing
Last viewed: 1 day ago
4.5 Company Review
■Features - Demonstrates anti-loosening performance that is resistant to vibration and high-speed rotation. - Loosening torque is much higher than ...
Tatsuta Co., Ltd.
140+ people viewing
Last viewed: 2 hours ago
4.5 Company Review
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). - 4 hook spanner grooves. ■Applications Precision spin...
Nikki Co., Ltd.
130+ people viewing
Last viewed: 15 hours ago
■What is AN nut (bearing nut)? A nut is one of the fastening parts used for assembling machines. It has an opening called a female thread (female t...
Nikki Co., Ltd.
240+ people viewing
Last viewed: 19 hours ago
■Features By using a special stainless steel set screw, it is now possible to tighten the set screw with high torque. By finishing the effective th...
6 models listed
Nikki Co., Ltd.
340+ people viewing
Last viewed: 4 hours ago
■Features For ball screw support bearings, the screw shaft and bearing can be fixed easily and accurately. *Other product numbers are available.
10 models listed
Hard Rock Industries Co., Ltd.
100+ people viewing
Last viewed: 2 hours ago
The HLB uses the same wedge-integrated structure technology as the Hardlock Nut, so it can maintain the initial preload for a long period of time n...
Nikki Co., Ltd.
380+ people viewing
Last viewed: 2 hours ago
■Features The set screw is perpendicular to the axial direction, and is designed to be divided into 3 parts (equally spaced at 120 degrees). This i...
10 models listed
