Differential Case Tooling (Full Sphere)
Full-Sphere Differential Case Tooling
Differential Case Tooling | Full-Sphere
CNC Machine or Special Machine “Full-Sphere” Style JPT Motion Tool with Fixturing. “Full-Sphere Motion Tool & Fixture” diff-case solution for manufacturing full-sphere diff-cases “The JPT Way.” U.S. Patent Number 7,909,548 |

JPT “Full Sphere and Fixturing System” for Machining Differential Case Housings – U.S. Patent Number 7,909,548
Since 1973, two years after our beginning, JPT has been designing and manufactured Differential Case Tooling evolving into our “Best Practices” or “The JPT Way”.
Our specialty application experience covers Many, Many different types of parts and associated materials that require exacting tolerances.
Differential Cases are a PRIME FOCUS of JPT
During this time JPT has established a great library of application knowledge…….
Including (70) Differential Case part prints in the past five years alone.
As a result of this, JPT has developed insert-style “Full-Sphere” Differential Case Tooling and Fixturing that provides extremely high-quality workpieces and tool life.
This success is due to VERY SPECIFIC JPT design and manufacture focus on;
- Fixture design.
- Insert material, geometry and tolerancing.
- Recommended speeds and feeds.
- Workpiece material and process.
- Machine Tool Specifications.
- Part “In” condition…..prior operations.
- Locate and clamping points / method.
- Tool Setting Offset Gaging.
- Run-off requirements.
See the JPT “Full-Sphere” product offering.
See the “Drop-In” JPT PASS™ for CNC Equipment.
See the complimentary JPT Differential Carrier Tooling product offerings.
In addition to the above, JPT is frequently involved in the process and fixture concepts as well as the machine tool application and maintenance. Our involvement in all of the mentioned elements produces very successful applications.
So successful are these that a number of elements have United States and International Patents (and Patents Pending)….including the JPT PASS ™ Cutter Insertion System utilized by Machine Tool Builders for converting new or existing equipment into Differential Case machining cells.
When we are asked to “quote a tool” along with “back-up” inserts………without the aforementioned involvement…..the outcome is generally poor and all involved have generally been displeased. We are certain that this is due to the “Manufacturing Marketplace” viewing this type of tooling as a “COMMODITY” (such as a standard catalog toolholder or insert) and fairly often not understanding the discipline required and the complexities involved.
Subsequently, JPT’s increased involvement in all areas of Diff-Case manufacturing has grown out of necessity as needed by our customers.
Product Features & Capabilities
- Rough and Finish Sphere in One-Pass.
- Adjustable Roughing Insert & Micro-Adjustable Finishing Insert.
- Greater Tool Life over other Methods.
- 300 to 500 (%) Percent Work Cycle Reduction over other Methods.
- Can be Mounted on CNC Sub-Spindle Lathes.
- Can be Used on CNC Machining Centers.
- Part Quality Built into each Tool.
- Tool Always in Balance.
- Tool Supported for Maximum Stability.
- Tool Setting Gages.
Special Options
- DFC Surface Treatment for friction reduction and corrosion resistance.
- Coolant available through the tool.
- Repair Service.
Have a new project or tooling challenge? Let’s talk. Our team is ready to help you find the most cost-effective solution for your specific application.
Why Choose JPT
50+ Years Engineering Excellence – in Tooling & Component Manufacturing
20+ Countries w/ Active Clients & Installations
Millions of Components & Tools Delivered Annually
ISO 9001:2015 Certified & Aerospace-Compliant Facility – Built for Quality, Certified to Perform
Confidentiality & Supporting Solutions – Trusted by Tier 1 suppliers & OEMs
Low-Volume Part Production – Ideal for prototyping, spares, and specialty defense projects
Application-Specific Engineering & Tool Design – Engineered for your exact part geometry
Advanced Tool Life Optimization – More uptime, fewer changeovers.
Made in the USA – Built with pride, precision, and speed.
Custom & Standard – Tailored solutions for your needs, ranging from custom indexable cutting tools to standard designs.
Fast Turnaround Times – Minimize downtime & maximize productivity.
Have a new project or tooling challenge? Let’s talk. Our team is ready to help you find the most cost-effective solution for your specific application.
What are Best Practices?
The casual observer may interpret the term “Best Practices” and consider that such a concept is subjectively slanted with many personal points of view. Within the context of the JPT White Paper and Case Study Offerings are experiences drawn from successes as well as failures since our founding in 1971.





