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CNC Milling of Extruded Aluminum Day Gate Latch for the Security Industry


TMF, Incorporated was recently hired by a client to CNC mill a series of extruded aluminum day gate latches for the security industry. This day gate latch is constructed from 6061-T6 aluminum material and is used to hold shut day gate doors within banks. The latch also consists of one solid piece containing no moving parts.


Using our advanced milling machinery, which can uphold precision tolerances as low as (+/-) .010 of an inch, we milled this part to measure 2 inches in length, 3 inches in width, and 3/16 of an inch in thickness. The latch also weighed 6 ounces. In addition, we milled all latch windows, drilled all necessary holes, and tapped all threads – machining this part completely based on a customer supplied print. After the CNC milling process was finished, we then employed our vibratory tumble finishing equipment to debur the final products ensuring that they possessed no sharp edges.


After the day gate latches were processed, we then fully inspected each component to ensure they met with all of our client's unique product requirements. Once the day gate latches were ready for shipment, we delivered all 1,000 requested units to our client's facility in Siler City, North Carolina.


This extruded aluminum day gate latch is essential in ensuring the security of multiple banks and private buildings. Therefore, this part needed to be properly machined to meet our client's precise specifications. With a reputation for manufacturing high-quality, precision components, TMF was entrusted with this job. Our ROHS compliant shop is equipped with advanced milling machinery able to hold the tight tolerances necessary to properly manufacture these parts. These extruded aluminum day gate latches met with ultimate customer satisfaction.

Product Description:

                                                                                       This Security Latch is used within banks to hold day gate                                                                                            doors shut.

Capabilities Applied/Processes:

                                                                                       CNC Milling




Equipment Used to Manufacture Part:

                                                                                       Milling Machine

Overall Part Dimensions:

                                                                                       General length, width, Thickness  3/16" x 2" x 3"

Tightest Tolerances:

                                                                                       +/- 0.010

Material Used:

                                                                                       6061-T6 Aluminum

Surface Finish:



                                                                                       Vibratory Tumble-Leaving no Sharp Edges


                                                                                       One Piece with no Moving Parts

Typical Machining Operations:

                                                                                       CNC Milling:

                                                                                       Mill Window



In process testing performed:

                                                                                       Measure hole location

Estimated Part Weight:

                                                                                       6 oz

Industry for Use:






Delivery Location:

                                                                                       Siler City, NC

Standards Met:

                                                                                       Customer supplied print, 2D CAD Drawing

                                                                                       RoHS Compliant

                                                                                       Any other standards met?

Product Name:

                                                                                       Day Gate Latch

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