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Retainer Dog

At Tychon, Inc. we manufactured the zinc plated retainer dog pictured here for a customer in the amusement park industry. With very tight tolerance requirements of ±0.0005” on the finished product, our challenge was to consistently attain the correct machined dimensions to accurately account for the plating thickness. In addition, we had to maintain tight control of the plating process to ensure we achieved the correct level of plating thickness, which is typically measured in the single digit micron range.

Production involved 3- and 4-axis milling to form the geometric shape and create the detailed features of this complex, precision-engineered part, which featured dimensions of 1-3/4” in length x 1-3/4” in width x 7-1/2” in height. We designed and built a customized fixture to perform 4th axis milling process. Since this was a technically precise application, we machined the part from AISI 1018 cold rolled steel, a mild low-carbon grade with a good balance of strength and toughness. The properties of cold rolled steel promoted quality, allowing us to machine the part with close tolerances. Additionally, Tychon had zinc plating, per ASTM B633 Type III standards, applied. This particular finish provides cost effective corrosion protection and consists of zinc plating followed by a chromate coating to increase the protective qualities. Our rigorous quality control procedures incorporated a series of dimensional measurements using instruments such as calipers, bore micrometers, gauge pins, and others.

From start to finish, this project took us five weeks to complete. The client was impressed with our ability to maintain consistent, close tolerances. If you have a similar part and would like to learn more about our precision machining capabilities or request a quote, contact us directly.

Zinc Retainer Dog
Zinc Retainer Dog
Retainer Dog
Retainer Dog
Milled Retainer Dog
Milled Retainer Dog

Retained Dog Highlights

Project Name & Description
Retainer Dog
Capabilities Applied/Processes
3 & 4 axis milling
Equipment Used to Manufacture Part
CNC Mill
Overall Part Dimensions
1-3/4" X 1-3/4" X 7-1/2"
Tightest Tolerances
(+/-) .0005
Material Used
AISI 1018 CR
Material Finish
Zinc plate per ASTM B633 Type III
Industry for Use
Amusement Park
In Process Testing/Inspection Performed
Caliper, bore mic, gage pins, thread gages
Delivery/Turnaround Time
5 weeks
Delivery Location
Standards Met
As per customers requirement
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