About Us

About Us

At Quality Screw Machine Products, our dedication to precision, consistency, and reliability is rooted in our team of highly skilled professionals. Every member of our setup personnel brings over 10 years of experience in the trade, ensuring expert craftsmanship and attention to detail in every job. This wealth of knowledge allows us to deliver complex, tight-tolerance parts with unmatched accuracy, no matter the scale of the project.

Our History

Founded in 1987, Quality Screw Machine Products has grown from humble beginnings into a leading provider of precision-machined components. Originally established in a 5,000-square-foot facility in St. Louis, our company focused on producing low-volume, high-quality parts. Today, our commitment to excellence has fueled continuous growth, and we now operate from a 33,000-square-foot facility, equipped with advanced machinery and technology to meet the evolving demands of modern manufacturing.

Over the years, our company has evolved from a small operation into a versatile, full-service machining partner. While we have expanded our production capabilities to accommodate higher volumes and more complex projects, we have never lost sight of the core values that built our reputation: quality, reliability, and customer satisfaction. We continue to invest in the latest technology, such as CNC lathes, Swiss turning machines, and vertical milling centers, to provide our clients with the best possible solutions for their manufacturing needs.

Our Clients

Our clients span a variety of industries, including automotive, aerospace, medical, agriculture, and more. Whether it’s producing high-precision components for life-saving medical devices, rugged parts for heavy equipment, or intricate automotive support systems, we are proud to deliver parts that consistently exceed industry standards.

Our Commitment

As we look to the future, Quality Screw Machine Products remains committed to growing alongside our clients. We will continue to expand our capabilities, refine our processes, and uphold the values that have guided us since our founding. Our team is ready to tackle any challenge, providing the expertise and precision that define every part we produce.

Thank you for considering Quality Screw Machine Products as your trusted machining partner. We look forward to supporting your business with the highest level of craftsmanship and service.

Our Quality Policy

The Management and Employees of Quality Screw Machine Products commit themselves to the pursuit of excellence by exceeding our customers’ expectations for world-class products and service every day.

Inspection

Our inspection department is equipped with essential tools to ensure precise quality assurance and measurement. Our optical comparator allows for detailed visual inspection of parts. Our profilometer accurately gages surface roughness and texture. We have an a Dimensionair, air gage system that provides highly sensitive measurement of internal bores, ensuring tight tolerances. In addition, we utilize a range of handheld tools, including micrometers, calipers, ring gages, plug gages, pin gages and concentricity gage to verify concentricity with exceptional accuracy, as well as other essential gages. Together, these instruments enable us to verify products meet the highest standards of precision and quality.

Our Certifications

Quality Screw Machine Products, Inc. is certified ISO 9001-2015. FM 678694. British Standards Institution auditors determined the company meets International Organization for Standardization requirements for consistently high-quality products and manufacturing processes.

Screw Machining FAQs

On a daily basis, we receive several similar questions that seem to come up repeatedly from our customers and purchasing agents. So we’ve decided to answers those frequently asked questions most received:

A screw machine is a cam-driven automatic lathe that typically features a single spindle, though some models may have multiple spindles and machining stations to enable high-speed, high-volume production. In this process, the material rotates within the machine while the tools remain stationary. The operation is progressive, allowing for the machining of 6 to 8 parts simultaneously, with each station performing a specific task as the workpiece moves through the machine.

We have the capability to machine a wide variety of materials. The most common materials we work with include brass, carbon steels, alloy steels, stainless steels, aluminum, and copper and bronze alloys. Additionally, we can machine tool steel, plastics, Delrin, and other specialty materials. In terms of shapes, we handle round, hex, and square bars, tubing, as well as some extrusions and custom shapes. We manage both small quantities sourced from service centers and larger production runs, working with major players in the raw materials industry.

We are a low to high volume, high-production job shop specializing in custom manufacturing. Every piece we produce is tailored to meet our customers’ unique specifications. We do not manufacture off-the-shelf items or sell under any trade names; all of our work is customized to each client’s needs.

This is one of the most frequently asked questions in our industry. There is no definitive answer, as each part is unique in terms of its manufacturing requirements, so every project is evaluated individually. We follow the principle of balancing complexity with quality. While we generally prefer higher-volume jobs, we are open to considering lower-volume projects if the part is easier to machine.

We typically prefer blanket orders with scheduled releases for medium to high production requirements. However, we can also accommodate one-time orders, where the entire quantity is produced and shipped in a single shipment. Our focus is on securing long-term projects, as this helps our customers better manage both piece pricing and inventory costs. While we are flexible with release schedules, our goal is to ensure that inventory for each part is refreshed within 12 months.

We maintain a comprehensive list of approved vendors for external services such as furnace heat treating and plating. Based on the specific requirements, we collaborate closely with a trusted vendor to ensure that parts are manufactured to precise specifications. For machining, we offer a wide range of secondary capabilities, including broaching, gear hobbing/cutting, spline/thread rolling, centerless grinding, and induction hardening. We begin with raw materials sourced from approved suppliers and handle both primary and secondary machining in-house, and deliver the finished product.

Our lead time is primarily determined by material and tooling availability, as well as machine capacity. Generally, we aim for a lead time of 4 – 8 weeks from the receipt of the order.

Our tolerance limits are influenced by the materials used, the specific operations required to manufacture each part, and the location of the dimension on the part. As a general guideline, we typically aim for ±.005 tolerances for screw machine parts. For certain jobs, we can maintain tolerances within ±.001. When it comes to grinding, we can achieve total tolerances as tight as ±.0002.

We can provide PPAPs upon request, which are managed by our quality department and approved before production begins. The cost for this service can either be included in the upfront tooling and engineering charge or amortized into the piece price.

We apply a one-time tooling and engineering charge for each new order. This cost is invoiced only after the parts are approved for production and is billed once during the lifetime of the project, unless there is a print change or other exceptional circumstance. The charge covers the initial engineering for job-specific tooling, setup labor, resources, and machine downtime. Additionally, we amortize tooling and setup costs into the piece price for perishable tooling and ongoing setups. These costs are evenly distributed across each piece, meaning higher volume orders benefit from lower setup and tooling costs compared to lower volume jobs. With higher volumes, we also receive discounts on tooling orders and can complete setups more quickly, which reduces costs proportionally.