Ball-Ended Thrust Screws are used primarily for applying adjustable thrust through a swiveling ball tip without fixing the contact angle. This page lists the industries and assemblies where they are specified, the selection criteria that matter for each application, installation practice, and the cases where a different fastener type is the correct choice. Parts are supplied to Trade series (ball-ended thrust screws). Stocked across roughly 1 to 5, they cover light-duty and instrument-scale work.
Typical Applications for Ball-Ended Thrust Screws
The most common settings where these are specified:
- Machine fixtures: A swiveling ball tip contacts an angled workpiece without gouging it.
- Clamping mechanisms: Ball-ended screws distribute point contact during adjustment.
- Alignment tooling: Metric and inch lengths suit small stops and supports.
- Optical equipment: Black-oxide alloy steel provides a compact adjustment point.
How to Specify Ball-Ended Thrust Screws for Your Application
- Size: Match the nominal size to the mating thread or hole. This product spans 1–5; check the full table below for the exact dimensions of each size.
- Drive & head: Pick the drive (socket, cross, slot) and head style for the tool access and seating surface; a recessed drive resists cam-out under power tools.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to Trade series (ball-ended thrust screws). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Installation & Assembly Practice
- Match the driver exactly to the recess (PH ≠ PZ; hex key sizes per ISO 2936) and keep the tool axial — side load is the main cause of stripped drives.
- In tapped holes, engage a thread length of at least 1× the nominal diameter in steel, 2× in aluminum.
- Set power tools to a torque that seats the head without embedding it into the mating surface.
Common Selection Mistakes with Ball-Ended Thrust Screws
- Under-sizing the drive for the installation torque — a small recess at high torque strips before the screw is seated.
- Using a countersunk head in thin sheet where the countersink removes most of the load-bearing material.
- Specifying stainless in high-strength duty: A2-70 is roughly class 7 steel, not a 10.9 substitute.
Where Ball-Ended Thrust Screws Are Not the Right Choice
Not for high-preload structural joints (use a property-class bolt and nut), and not in thin sheet where a self-drilling or self-tapping type suits better.
