About Iseli Precision

Iseli Precision

402 North Main St.
Walworth, WI 53184
Phone: 262-275-2108
Fax: 262-275-6094

Investing in the Future

Founded in 1946, Iseli Precision is the leading supplier of Swiss screw machine products in the country. Iseli Precision operates over 200 screw machines in 90,000 square feet of space, and provides the precision machining expertise, technology and workmanship to meet your precision component requirements.

While building our operation and reputation as a traditional Swiss screw machine shop, continued investment in modern technology and equipment has enhanced and increased our precision machining capabilities.

Multi-axis CNC Swiss lathes, computer-based “real time” SPC systems, CNC turning centers and Computer Aided Design (CAD) technology for tooling and process development, all supplement and increase the traditional Swiss screw machining capabilities that we offer our customers.

At Iseli Precision, we recognize that the key to our continued success is to assist our customers in their efforts to succeed in a competitive marketplace.

Our focus on utilizing “lean manufacturing” tools and principles to drive continuous improvement in our quality, delivery, safety and cost competitiveness is what will best support this initiative.


Materials Used:

  • Brass
  • Stainless steel
  • Aluminum
  • Beryllium
  • Copper
  • Cold rolled steels
  • Titanium
  • MONEL®
  • Plastics



  • Valves
  • Electronics
  • Instrumentation
  • Medical
  • Consumer Products
  • Aerospace
  • Defense
  • Automotive

ISO 9001:2015 Certified

Quality is the most essential element of our business, and continuous improvement is the job of every employee.