The drill tips stop on the axial locator (mounted to the face of the chuck), and the Insert Pads (mounted in their sub jaws) clamp down on the outer diameter of each drill tip before grinding its shank.
The Insert-Pad and Sub-Jaw design to allows for quick changeover between sizes.
High precision custom work holding, finishing all part machining operations in only two setups. Reducing error and saving time.
Our Customer is a well-established high precision machine and automation provider. They required a custom solution to complete all machining operation in two steps.
Work holding on a rotary table within a 5-axis machine.
A chuck with custom hardened jaws to grip the finished side of the work piece from the first step.
Read on to see how the Northfield engineers solved this problem…
The first chuck is based on the 450W Sliding-Jaw Air Chuck, for mounting to a rotary table for 5 axis machining of the first portion of the final product.
The custom top jaws are hardened and ground to size before coating with 150. Grit diamond. This ensures a good grip on the customers rough turned blank.
Northfield work holding solutions include air detect axial locators. This in this case, 3 air ports on the 3-part banking surfaces. Ensuring positive, part seat confirmation before the machining process begins.
The second stage of the process involves gripping the finished side of the part from the first step without damaging, to finish the second step.
To accomplish this, we added custom hardened and ground sub jaws to a Model 470W Sliding-Jaw Air Chuck. These hold specially Electro Discharge Machined (EDM) inserts, designed to grip the finished side of the part produced in first machining operation. Additional machine clearance was required at this stage, so the chucks are also mounted to custom Vertical base plate risers. This accommodates for the machine clearances.
Finally, this chuck also includes a special air detect axial locator, with 1 air port on the part banking surface, for positive part seat confirmation.
Are you looking for a custom work holding solution that includes a collaborative design process? Then get in touch today and discuss your projects with the Northfield engineering team.
Our customer manufactures delicate ceramic rings. They need a way to carefully hold them on the outer diameter so they can grind the inner diameter. To protect the parts, they requested no metal contact points.
We produced a 6” Diaphragm Chuck with non-metallic top tooling in contact with the customer’s part. The top tooling is made from the most abrasion-resistant plastic available and these items are easily replaceable for new ones should a future need arise.
Northfield Precision Instrument Corporation is a leader in developing custom solutions for difficult problems. Click here to get in touch.
Recently at Northfield we produced a custom internal grip collet chuck for balancing drive shafts.
The collet on this chuck grips the pitch diameter of splined C.V. joints of a driveshaft assembly.
The ‘cone’ has multiple stop pads for axial location.
Tapped holes balance the chuck assembly prior to production.
The chuck repeats to less than 0.005mm total indicator reading (T.I.R.).
Northfield is the world’s premier manufacturer of ultra-precision balance chucks for prop shafts, with chucks that weigh less than half of our competitors. We are also the only chuck supplier recommended by major balance manufacturers.
No, we’re not making a fashion statement for chucks here!
At Northfield, we affectionately refer to the aluminium anodized chuck as “BIG RED”. Creed Monarch use “BIG RED” to manufacture close tolerance parts for Robert Bosch Power Tools.
We designed “BIG RED” to accommodate the unusual shape of the ‘Wobble Plate’ part of the drive mechanism in a Bosch reciprocating saw. Improving accuracy and dramatically reducing change over time.
The “Wobble Plate” is made from 52100 tool steel and heat-treated to 58/63 Rockwell. Spinning at 3,500 rpm for hard turning the “Wobble Plate” internal diameter, creates the outer race of a bearing set.
“BIG RED” is a example of our custom work holding at Northfield beyond the chuck.
The spring-loaded plunger and locator ensure accurate locating of the “Wobble Plate” to four specific reference points.
When hand mounted on the face of a fixture, the unique design provide repeatability of 0.002 inches.
The fixture allows automatic operation after the initial loading.
“BIG RED” solved previous holding problems and saves a tremendous amount of production time.
Do you have a special work holding need that we could help with? Get in touch now.