All Categories
History
This section provides an overview for centering bars as well as their applications and principles. Also, please take a look at the list of 5 centering bar manufacturers and their company rankings.
Table of Contents
A centering bar is a jig that detects the origin position of a machine tool on a flat surface with a high accuracy.
The centering bar is held by the machine tool and moved slowly toward the edge of the workpiece while the spindle is rotating, until the eccentricity of the centering bar, which is in contact with the workpiece, is completely eliminated. The position where the runout is completely eliminated can be defined as the origin. This is an important item because the accuracy of the origin is directly related to the accuracy of machining.
Origin positioning by the touch sensor is also available. While touch sensors are convenient, it takes time and effort to compensate for any abnormality that may occur.
Centering bars are used when machining with lathes, milling machines, and other processing machines that require high accuracy.
On a lathe, the chucked centering bar is brought close to the rotated material, and the origin position is determined by the runout of the chucked material. If centering is required again after machining, the use of a dial gauge is recommended.
On the milling machine, the table is flattened with an oil wheel, and then the centering bar is set on the collet. It can be adjusted visually by bringing it close to the material. If eccentricity is observed, the levelness can be adjusted using a copper plate or arrow.
When used on NC/MC machine tools, the shank of the centering bar is attached to the milling chuck or drill chuck, and the centering bar is slowly brought close to the workpiece and rotated so that the measuring element is eccentric. When the workpiece is slowly brought closer to the measuring element while it is rotating, the eccentricity becomes smaller and the runout of the measuring element is eliminated, and the workpiece is adjusted so that it is completely stationary. When the workpiece is moved slightly from the stationary state and comes into contact with the workpiece, the measuring element moves along the measurement surface. This position is the reference position, considering the diameter of the measuring element.
Since the centering bar is made of metal, it will become magnetized and cease to function after prolonged use. It must be replaced after a certain period. Since it is classified as a consumable item, a non-metallic material with excellent durability is ideal.
The accuracy of the origin is an important item because it directly affects the accuracy of processing.
Depending on the application, materials are selected from stainless steel, non-magnetic special steel, ceramic, chrome molybdenum steel, etc.
In addition to coordinate detection, it is used to measure the diameter of a circle and the distance between two points.
*Including some distributors, etc.
Sort by Features
Sort by Area
Radiation Products Design, Inc., founded in 1975 and headquartered in Albertville, Minnesota, is a manufacturer and seller of medical equipment used by physicists, doctors, dosimetrists, and therapists in the radiation oncology field. The company’s product portfolio includes MRI products, stretchers, eye plaques, gloves & accessories, and block room products & accessories. The company also offers custom design and manufacture to meet the customers' specific needs as well as repair and modification of electronics, machining, welding, and plastics.
Fuji Tool Co. Ltd., established in 1933 and based in Chiba, Japan, is an ISO 9001 and ISO 14001 certified manufacturer of precision tools and jigs. The company produces measuring tools, such as radius gauges, drill point checkers, inside vernier calipers, and contour gauges. It also manufactures jigs, mini-magnetic stands, vises, clamps, and edge finders. Its products find application in the automotive and metalworking industries across various regions, including Europe, Oceania, North America, East Asia, and Southeast Asia.
Muraki co.,ltd., founded in Osaka, Japan, in 1906 is a manufacturer and supplier of machinery parts and tools. The company's product portfolio includes Tool bits, Cutting tools, Industrial brushes, Measuring equipment and tools and diamond pastes. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building. The company also provides services including national distribution, product selection, customized services, technical support and customer service.
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
|
3 | 60.0% |
|
Japan
|
2 | 40.0% |
18 products found
18 products
Nissin Sangyo Co., Ltd.
70+ people viewing
Last viewed: 6 hours ago
Centering gauge, standard for centering. In addition, three-dimensional measurements such as inner and outer diameters, steps, circles, etc. can be...
Rinos Co., Ltd.
170+ people viewing
Very Fast Response
■ Characteristics ・ It is possible to work easily with a single touch of a milling board, MC, etc. with one touch. ・ Measurement can be performed...
Tool System Co., Ltd.
220+ people viewing
Last viewed: 2 hours ago
■Features ・ER spring collet chuck system ultra slim straight shank type ・Centering bar High precision/Low price ・Touch sensor Highly sensitive p...
2 models listed
Taiyo Mold Supplies Co., Ltd.
420+ people viewing
Last viewed: 18 hours ago
Swiss-made centering bar Zentrofix. Instantly measures the reference position for milling with ultra-high accuracy of 1-2/1,000mm. ■Features ・It ...
3 models listed
Kuroda Co., Ltd.
250+ people viewing
Last viewed: 2 hours ago
■Features ・Since the shaft inside the shank also rotates, the internal spring is less likely to be damaged. ・Measurement terminals are made of ca...
6 models listed
30+ people viewing
Last viewed: 18 hours ago
The ceramic probe blocks magnetism and prevents the adhesion of iron powder, abrasion powder, etc. It also has excellent wear resistance.
20+ people viewing
The outer periphery of the sliding part is black, making it easy to distinguish from the silver sliding surface. By rotating and measuring, runout ...
30+ people viewing
Smooth movement is achieved because the sliding surface has a mirror finish. Detects the reference position within 2μm.
20+ people viewing
Can be used in a wide range of applications, from machining centers to NC milling machines.
