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Electronic Vehicle Components – Ask me Anything Recording Part 1.
Northfield Precision has been in business since the 1960s and constantly developing ever since.
This summer we introduced our very first ‘Ask me Anything’ webinar. Hosting an open discussion with customers and business partners to develop workholding knowledge together.
This presentation’s theme is on the hot trend of Electric Vehicle component manufacturing.
Due to operating with fewer parts and producing less vibration and noise than their combustion engine counterparts, EVs require parts that are created with higher tolerances concentricity.
This is where Northfield precision can help.
In the first video, CEO Paul de Feo introduces several recent projects demonstrating the high level of accuracy achievable with Northfield Precision’s workholding solutions. including double diaphragm and reverse diaphragm solutions.
We are the world’s premier manufacturer of ultra-precision balance work holding, with chucks weighing less than half of the competition. We are the only supplier recommended by major balance manufacturers.
Our mission, is to provide manufacturing companies with the most accurate work holding solutions in the world.
Northfield Balancing Chucks Feature:
Shortest hung mass
Fastest & most accurate change over
When parts rotate without calibration, uneven pressure can occur and cause errors with the end-product. Firstly, within a high precision environment the smallest difference can have a huge impact on the final product. Therefore, when fine tolerances are exceeded the result can be expensive and time-consuming repairs.
With ever increasing speeds used on rotating machinery, balancing is increasingly necessary. The trademark accuracy and repeatability of Northfield chucks allow customers to take their designs to the next level.
Recently we have been producing internal grip collet chucks for balancing drive shafts. They are capable of repeating to less than 0.005mm total indicator reading.
To achieve this, the collet is ground to grip the pitch diameter of splined C.V. joints of a driveshaft assembly. Secondly, the “cone” has multiple stop pads for axial location and finally, tapped holes are used to balance the chuck assembly prior to production.
8000 RPM Double Diaphragm Chuck
This customer required a chuck for their balancing machines to hold drive shafts by their slip-yokes.
Normal balancing operations are performed at approximately 900 rpm. High-performance vehicles like Stock and Formula 1 cars hit 200 mph with their drive-shafts rotating at 10,000 to 12,000 rpm. Therefore, this case required accurate holding at road conditions, 8000 rpm.
The Northfield solution consists of two separate custom diaphragm chucks built together. There are two separate sets of jaws, one mounted in front of the other. This accommodates the long, thin shape of the part. With one set of jaws gripping the front of the piece and the other gripping the rear.
The result is accuracy of 1/10,000″ T.I.R. and repeatability to 50 millionths with extreme rigidity.
This custom project used an 8” diaphragm chuck with custom top tooling for balancing aluminium turbine impellers.
The first, locates the workpiece using strategically positioned carbide pins between the blades and custom jaws clamping outside of blades.
The second, operation locates the impeller on the finished surface using a continuous ring locator. Custom jaws clamp the outside diameter of the workpiece. This allows the customer to finish balance the impeller blades
In summary, we offer both stock and custom solutions.
Northfield’s long-standing relationships in the balancing industry speaks volumes about the products and service offered. Get in touch today to discuss your latest product with the engineering team.
Our customer is a precision manufacturer of engine and fuel injection systems.
is to solve the problem of extreme wear on the grip area on the jaws. Northfield Chucks can be customized with a variety of top tooling options. Here is one of our standard 4” sliding-jaw chucks (Northfield Model 450). Especially modified for our customer.
To solve this, we developed a custom set of jaws containing brazed carbide for the grip lands of the jaws. The result, the jaws last approximately 3 times as long, before requiring a regrind.
Could this kind of modification to a standard work holding chuck help you solve a problem?
This project is for a longstanding customer who produces: precision machines, tools, and rotary tables. The brief requires gripping the inner diameters of continuously variable transmission (CVT) sheaves for runout inspection.
The work holding challenge is to create a chuck for auto-loading in an autonomous machining environment. We are their preferred supplier for custom and high precision projects and therefore need to deliver our trademark accuracy and repeatability.
Solution: How did we deliver?
Positioning the part by robotic arm requires every custom feature ensures proper seating before the machining operation begins.
The custom top-jaws are permanently mounted onto the chuck’s master-jaws. This grips the inner diameter of the sheave’s central bore.
The 3 air holes in the top surface of each custom jaw are an air-detect Axial Locator.
The jaws are also ground at mid-stroke of the chuck, providing a large part-load clearance.
Finally, analysing all critical surfaces that interface with the part, this work holding chuck delivers the trademark Northfield accuracy of of .0001” TIR and repeatability.
Our innovation and relationship building is what sets us apart from the competition. Do you have a high precision challenge? Contact us to see how the Northfield team can solve it.