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We are leaders in the market for providing best range of INJECTION MOLDING BRASS PIN, FIBER OPTICS STAINLESS STEEL BODY, A SUPER ALLOY AEROSPACE FASTENE, A WEHNELT ELECTRON GUN ELECTRODE and precision micro machining

precision micro machining

  • Equipment Used to Manufacture Part ± 0.001"
  • Overall Part Dimensions Length: 0.133" Diameter: 0.078" Wall Thickness: 0.0312"
  • Tightest Tolerances ± 0.001"

At Kroll Technologies LLC, we utilize advanced CNC machining equipment and de-burring systems for precision burr-free results. This project required precision micro machining of a connector forward insulator for the Microwave industry. The part was machined out of polyphenylene sulfide on one of our Citizen B12’s using turning, drilling, boring, slotting, grooving, cutoff, and backworking operations for a complete part off the machine. Ultrasonic cleaning and mass de-burring produced an insulator free of residue and burrs. Final part dimensions were .133” in length with a diameter of .078" and wall thickness of .0312". Dimensional inspections utilizing Keyence and Micro-Vu automated vision systems were conducted to verify that dimensions were within the required tolerances of ±.001". We currently manufacture 100, 000 pieces annually for this Pennsylvania customer with a turnaround time of 3 weeks for smaller individual orders. This project highlights our capability to manufacture high precision burr-free plastic parts.

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CNC Swiss Machining

  • Equipment Used to Manufacture Part Citizen C32
  • Overall Part Dimensions Length: 0.451" Diameter: 0.875"
  • Tightest Tolerances ± 0.0005"

A manufacturer of Microwave connectors needed a stainless steel, right-angle connector body manufactured. At Kroll Technologies LLC, we specialize in CNC Swiss machining, with extensive precision milling and tooling capabilities that were required to make this complex part. Our Citizen C32 was used for the required turning, milling, thread milling, drilling, boring and grooving needed to make this 303 stainless steel connector body. We also provided ancillary processes including de-burring, ultrasonic part cleaning, de-ionized water rinse and an in-house citric passivation. The finished component was machined to a 32 µin finish with overall dimensions of .451" in length and a diameter of .875". We utilized automated vision systems to ensure accurate dimensional inspections for tolerances of ±.0005”. Samples are also sectioned to expose internal geometry for measurement. We manufacture 20, 000 pieces annually for this customer with an average turnaround time of 4 weeks for smaller individual orders. At Kroll Technologies, we are one of the few Swiss CNC machining companies that can manufacture parts requiring this type of extensive milling, thread milling, and other live tool work. To learn more about this project, or the processes used to manufacture it, see the table below, or contact us directly.

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A SELF-LOCKING STAINLESS STEEL COUPLING

  • Equipment Used to Manufacture Part Citizen L20
  • Overall Part Dimensions Length: 0.285" Diameter: 0.352" Wall Thickness: 0.036"
  • Tightest Tolerances ± 0.0005"

Tooth machining is a very unique machining process. At Kroll Technologies LLC, we specialize in high precision machining and micro de-burring which are required to ensure proper tooth engagement to mating parts. This self-locking coupling nut project emphasizes these capabilities. Utilizing one of our Citizen L20 CNC Swiss machines, multiple processes were applied including turning, milling, internal threading, grooving, and boring. A proprietary tooth cutting process with engraving was also required on the mating coupling nut. This project also required micro de-burring, ultrasonic cleaning, de-ionized water rinse and in-house citric passivation, which ensure a residue and burr free part. Machined from 303 stainless steel, the finished part featured dimensions of .285" in length with a .352" diameter and .036" wall thickness. Customer specifications required the coupling nut to be machined to a 32 µin finish. We completed multiple dimensional inspections with automated vision systems to verify manufacturing tolerances of ±.0005". Tooth engagement testing was completed with the mating parts as well. We manufacture 3000 pieces annually for this Microwave connector industry customer with a 4 week lead time for smaller individual orders. This project emphasizes our CNC Swiss machining and post-machining capabilities. To learn more about this project, or the processes used to manufacture it, see the table below or contact us directly.

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A MICRO-SIZE BRASS CONTACT PIN

  • Equipment Used to Manufacture Part Citizen K16
  • Overall Part Dimensions Length: 0.096" Diameter: 0.012"

We were recently contracted by a manufacturer of connectors for the Microwave industry to produce micro-size brass contact pins. At Kroll Technologies LLC, our capability to manufacture high precision micro-parts was an ideal fit for the project. We utilized a Citizen K16 machine for high speed CNC turning followed by automated ultrasonic cleaning to ensure the parts were free of residue. This micro-size brass contact pin had an overall length of only .096” and was only .012" in diameter, with all dimensions at a tolerance of ±.0003". Dimensional integrity was verified with the use of an automated precision vision inspection system. We currently manufacture 250, 000 components annually of this part-family with 2-4 week lead times for smaller individual orders.

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INJECTION MOLDING BRASS PIN

  • Product Description Brass Terminal Pin for Injection Molding
  • Capabilities Applied/Processes Primary: CNC Turning Knurling Grooving
  • Equipment Used to Manufacture Part Citizen L20

A customer in the injection molding industry required the manufacturing of a brass terminal pin used in an injection molded part. At Kroll Technologies LLC, we manufacture high quality and low cost parts for a variety of industries with a fast turnaround time. One of our Citizen L20 CNC screw machines was used to machine this part which required turning, knurling, and grooving. Machining was followed by automated ultrasonic cleaning to remove any residue from the brass part. One of our many ancillary processes is in-house gold plating which was also required for this part. The overall dimensions of this terminal pin were .97" in length and .039" in diameter. In-process and final inspections utilized an automated vision system, verifying dimensions with tolerances of ±.001". We currently manufactured 20, 000 of these terminal pins annually. Sublots are provided within a 3-week lead-time.. The project exemplifies the multiple capabilities that we can provide for various industries.

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FIBER OPTICS STAINLESS STEEL BODY

  • Tightest Tolerances ± 0.0002"
  • Material Used 316L Stainless Steel
  • Material Finish 32 RMS Micro-Inch Finish

Kroll Technologies LLC utilizes the latest Swiss CNC machining technologies to manufacture the most complex and tightest tolerance parts for multiple industries. For this project, a customer in the fiber optics industry needed a connector body made from 316L stainless steel, which is capable of handling harsh environments. This project required the use of a Star SW-20 Swiss lathe, which features an opposing gang-type tool post and a tool post with Y-axis control. These state-of-the-art machines are specifically designed for maximum efficiency of complex parts. Once machining is completed, the body goes through automated ultrasonic part cleaning, de-burring, and nitric passivation to remove any potentially corrosive residue from the steel. The overall dimensions of the part were 1.5" in length with an outer diameter of .625" and inner diameter of .103", with a 32 RMS µin finish. At Kroll Technologies quality is key, and is maintained by our multiple inspections conducted during and after machining. Dimensions with tolerances as tight as ±.0002" are verified with precise automated vision system inspections. Initial quantities can be delivered within 4 weeks. We manufacture 3000 parts annually for this Pennsylvania customer. To learn more about this project or the processes used to manufacture it, see the table below, or contact us directlyEquipment Used to Manufacture Part

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A SUPER ALLOY AEROSPACE FASTENE

  • Overall Part Dimensions Citizen L712 Type VIII
  • Tightest Tolerances Length: 0.435" Diameter: 0.1457"
  • Material Used ± 0.00015"

In support of increased demand from our Pennsylvania based customer, Kroll Technologies LLC was selected to provide regular deliveries of Aerospace Fastener Blanks. Our customer supplied us with 2D CAD drawings of this component. As is done for all part projects, Kroll Technologies' Engineering team performed a comprehensive design review to ensure manufacturability as well as a complete quality plan by Quality Assurance. We started with .1875" diameter, A-286 Iron Based Super Alloy. The ultra-close tolerance of .0001" (2.5 microns) required us to machine these on our most recently purchased Swiss-type CNC Automatic Lathes. Cutting tools can breakdown rapidly when machining super alloy triggering near constant dimensional drift, A-286 is no different. Consequently, maintaining tight tolerances proves all the more difficult. Kroll Technologies simply flexed its staffing resources to tackle the challenge. After the parts were machined, they were degreased and cleaned using an automated ultrasonic cleaning system. Final part dimensions were .435" (11.04 mm) in length with a diameter of .1457" (3.70 mm). 100% dimensional inspections were performed using indicating micrometers, optical comparator and one of our Keyence IM-6020 vision measurement systems. We provide this to our Pennsylvania customer on a time schedule of 6 weeks. This project highlights our capability to manufacture exotic and difficult to machine material while maintaining extreme precision.

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A WEHNELT ELECTRON GUN ELECTRODE

  • Equipment Used to Manufacture Part Citizen L720 Type VIII
  • Overall Part Dimensions Length: 0.2992" Diameter: 0.433"
  • Tightest Tolerances ± 0.0020" ± 1 Degree 30 RMS

In support of a R&D project for our Oregon based customer, Kroll Technologies LLC was tasked with machining this Wehnelt electrode in prototype quantities. Our customer supplied 2D CAD drawings and 3D models of this component. As is done for all part projects, Kroll Technologies’ Engineering team performed a comprehensive design review to ensure manufacturability as well as a complete quality plan by QA. Kroll Technologies started with DFARS compliant, .500" diameter, 316 Stainless Steel per AMS-QQ-S-763, ASTM A276 which is inventoried on site along with a wide variety of raw materials. The complexity of this piece required us to machine the electrodes on a 7 axis Swiss-type CNC Automatic Lathe that offered the ability to turn, drill 1mm holes into the side of the part, as well as off-center drilling & helical thread milling of a miniature M1 x .25-6G thread into the face of the piece to drop them complete in one operation. After the parts were machined, they were degreased and cleaned using an automated ultrasonic cleaning system. Final part dimensions were .2992" (7.6mm) in length with a diameter of .433" (11mm). 100% dimensional inspections were performed using a micrometer, pin gages, thread plug gages, optical comparator and one of our Keyence IM-6020 vision measurement systems. To measure internal angles, radii and other geometry, a precise cross section of the piece was made available. Following inspection, the parts were passivated using citric acid per the ASTM-A-967 and AMS 2700 standards and packaged for shipment. To learn more about this project, or the processes used to manufacture it, see the table below, or contact directly.

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