A ground ball screw is a precision linear motion component in which the thread form on the screw shaft is created by grinding rather than by rolling. ZHEJIANG SIKETE TECHNOLOGY CO., LTD. manufactures the SIKETE Ground Ball Screw Series for applications that demand high linear accuracy, smooth motion, and low noise, including CNC machining centers, factory automation, semiconductor equipment, medical devices, and metrology instruments. Unlike a rolled ball screw, a ground ball screw is produced on precision grinding machines that cut the raceway geometry directly into hardened alloy steel or stainless steel. Because the thread profile is ground rather than formed under pressure, the lead accuracy, surface finish, and dimensional consistency of the finished ground ball screw are substantially better than those of a rolled product. The drive side journal is machined during the same production flow so that support bearings can be installed without any additional turning at the machine builder's site. The result is a precision ball screw assembly that converts rotary motion into linear motion with an efficiency greater than 90 percent, far above what a comparable sliding acme or trapezoidal screw can achieve. For engineers who need to hit tight positioning targets, the ground ball screw is often the single most influential mechanical choice in the entire axis design.

The engineering logic behind a ground ball screw is straightforward and worth understanding before specifying one. Recirculating balls run between the screw raceway and the ball nut raceway, so metal-to-metal sliding friction is replaced by rolling contact. That change reduces heat generation, wear, and the torque required to move a load, which in turn allows smaller motors and lighter structures. A ground ball screw therefore delivers repeatable positioning over millions of cycles when it is lubricated correctly and installed with proper alignment. SIKETE produces ground ball screws with screw diameters from 3.0 mm to 15.0 mm and leads from 0.5 mm to 20 mm, and the company also accepts custom sizes for special machines. Every ground ball screw leaves the factory with the drive side already machined for support bearings, which shortens assembly time and reduces the risk of damaging the raceway during secondary operations. Because accuracy is built into the part rather than adjusted on site, the ground ball screw becomes a predictable, documented element of the machine's error budget. Review the broader PRODUCTS range to see how the ground ball screw fits alongside linear modules and gantry systems.

The first and most important advantage of a ground ball screw is very high lead accuracy. Lead accuracy describes how closely the actual axial travel matches the theoretical travel for each revolution of the screw, and it directly determines whether a machine can hold position at the commanded coordinate. Precision grinding lets SIKETE hold lead accuracy that rolled screws simply cannot match, which is why semiconductor equipment, metrology instruments, and optical systems almost always specify a ground ball screw rather than a rolled alternative. The second benefit is reduced positional error. Because the thread geometry is ground to tight tolerances over the full length of the screw, positional error stays small across the entire travel instead of drifting toward the ends of the stroke. The third benefit is superior rigidity. A smoother, more consistent thread profile distributes ball load evenly, so the nut resists deflection under cutting forces and dynamic acceleration. The fourth benefit is lower noise and vibration, a direct consequence of superior surface finish and precise geometry. The fifth benefit is long service life, achieved through high alloy or stainless steel, controlled heat treatment, and precision-grade balls. Taken together, these five characteristics explain why the SIKETE ground ball screw is chosen for equipment where a micron of drift can ruin a process.

Alongside the technical advantages, the SIKETE ground ball screw program includes custom engineering support that many buyers find just as valuable as the part itself. SIKETE's engineers review customer drawings, confirm the correct part number, recommend preload strategy, and supply samples so that a design can be validated before mass production begins. That support matters because a ground ball screw is rarely a catalog drop-in component; the journals, threads, and keyways usually have to match an existing housing and bearing arrangement. Access to real application examples helps engineers see how similar axes were solved, and the published Application Case library shows SIKETE hardware working in production environments. For machine builders who need both volume and consistency, OEM and ODM cooperation keeps the same ground ball screw specification stable from the first prototype to the ten-thousandth unit. That continuity of supply is often what separates a smooth product launch from a costly re-qualification cycle. In short, the ground ball screw is not just a purchased part; it is an engineered subsystem, and SIKETE treats it that way.

The SIKETE ground ball screw range covers the sizes most commonly required by compact precision machinery. Screw diameters run from 3.0 mm to 15.0 mm, with custom diameters available for special projects. Screw lead, also called pitch, ranges from 0.5 mm to 20 mm, which lets designers trade speed against resolution and axial force. Screw material is either high alloy steel or stainless steel depending on the environment, with stainless chosen for corrosion exposure or cleanroom compatibility. Screw accuracy grade is normally C3 or C5, and other grades can be quoted on request when a project needs something outside the standard offering. Axial play is controlled between 0 and 5 microns, a range that covers everything from general automation to demanding inspection axes. Ball nuts are most commonly flanged, and other nut types are optional depending on the mounting envelope. Preload is available through spacer balls or a double nut arrangement to achieve near-zero backlash where the application requires it. Finally, end machining — journal, thread, and keyway — is produced to the customer's drawing so the ground ball screw arrives ready to install. The complete selection of motion hardware is listed on the Key Products page for quick comparison.

Choosing the right numbers for a ground ball screw is a balancing act, and it is worth thinking through before an order is placed. A small lead increases resolution and axial stiffness but limits maximum travel speed for a given motor rpm. A large lead delivers fast positioning but reduces the mechanical advantage, so the motor must supply more torque. Diameter affects both rigidity and critical speed: a larger shaft resists buckling and whip better, but it also adds inertia and cost. Accuracy grade determines how much of the machine's error budget the ground ball screw consumes, and axial play determines whether the axis can reverse direction without a dead band. Material selection then layers on environmental requirements such as corrosion resistance and temperature stability. Because these variables interact, SIKETE's engineers frequently help customers optimize a specification rather than simply quoting a stock item. The goal is always the same: the smallest, most economical ground ball screw that still meets the accuracy, life, and load requirements of the application.

Every SIKETE ground ball screw is identified by a structured part number that encodes diameter, lead, accuracy grade, nut type, and total length. Understanding that nomenclature matters because it lets a designer specify a ground ball screw quickly and lets a purchasing team confirm that the quoted item matches the drawing. SIKETE publishes a ball screw part number nomenclature figure as a reference so that engineers can decode or construct a number without waiting for a reply. In addition, three downloadable resources are available: the SIKETE Ground Ball Screw Technical Data PDF, a ZIP archive of 2D drawings, and a ZIP archive of 3D CAD STEP models. Having the STEP model in hand means the mechanical designer can check clearances and bearing seats inside the assembly model rather than guessing from a dimension sheet. When a standard part will not fit the housing, customers can submit their own drawing and receive a fully custom ground ball screw with matching end machining. The quotation process is deliberately simple: send the drawing or the required specification, and SIKETE returns a reviewed proposal with part number, price, and lead time.

Custom drawings are the normal path for most precision projects rather than the exception, and it helps to know what information SIKETE needs. A complete request should include screw diameter, lead, total length, accuracy grade, nut type and mounting flange dimensions, preload requirement, and a fully dimensioned end machining sketch for both ends of the screw. It is also useful to state the operating environment, expected load, maximum speed, and required service life, because those inputs allow the engineering team to sanity-check the selection. If a support bearing or coupling has already been chosen, providing that part number removes ambiguity about journal diameter and thread length. When the drawing is complete, SIKETE can produce first articles or samples so the customer can validate fit and performance on the actual machine before committing to volume. This approach reduces the risk of an expensive redesign later and keeps the project schedule predictable. For many buyers, the availability of that drawing review service is the reason they consolidate their ground ball screw purchases with a single manufacturer.

Accuracy class is one of the most important decisions when specifying a ground ball screw, because it governs how much backlash the assembly will exhibit. Backlash is defined as excess axial free motion between the nut and the screw that occurs without rotation of the screw; engineers also call it lost motion. When an axis reverses direction, backlash must be taken up before the load actually moves, which introduces a small positioning error that no amount of encoder feedback can fully eliminate. A ground ball screw with a tighter accuracy class therefore produces a more predictable axis. This is why C3 and C5 are the two grades most often requested, and why the difference between them deserves a careful look. In short, C3 has less backlash than C5, and in a spacer-ball preloaded configuration it can be reduced to nearly zero. C5, by contrast, typically exhibits approximately 0.005 mm, or 0.0002 inch, of backlash. For many applications that is perfectly acceptable, but for others it is far too much.

The selection guide is fairly clear once the application is understood. C3 accuracy class ball screws are the right choice for semiconductor equipment, metrology instruments, optical inspection stages, and any axis where a few microns of error change the outcome of the process. C5 accuracy class ball screws are appropriate for general CNC machinery, pick-and-place systems, packaging equipment, and most factory automation, where the process tolerance is measured in tens of microns rather than single microns. Preload strategy works alongside accuracy grade: spacer balls create a light interference that removes axial play almost entirely, while a double nut allows preload to be adjusted and, in some designs, retensioned in the field. It is important not to over-specify, because a higher accuracy class increases cost and can also increase friction and heat if the preload is excessive for the duty cycle. A well-matched preload keeps the ground ball screw running cool while still eliminating the backlash that would otherwise appear at reversal. SIKETE's engineering team can model the trade-off and recommend the grade that satisfies the process capability requirement at the lowest total cost. Factory-direct pricing means the upgrade to C3 is often more affordable than buyers expect, and volume discounts are available for repeat programs.

Purchasing a ground ball screw online follows a simple path once the specification is settled. The store is organized by screw diameter so that buyers can move quickly from a rough requirement to a concrete part number. Precision ground ball screws with diameters from 3 mm to 6 mm serve compact instruments, small linear stages, and miniature automation axes. The 8 mm range is the workhorse size for general positioning tasks where a balance of rigidity and compactness is needed. The 10 mm range suits heavier loads and longer strokes where shaft stiffness becomes important. Every listing supports options for custom length, end machining, nut type, and preload, so a buyer is never forced into a compromise configuration. Items can be added to an inquiry cart, or a bulk quote can be requested directly for production quantities.

Before placing an order, it is worth confirming three commercial details that frequently cause delays. First, shipping method and lead time depend on whether the item is a standard stock configuration or a custom-machined ground ball screw, and custom work naturally requires additional production days. Second, sample orders are supported, which lets a design team validate a ground ball screw on a test rig before a production purchase order is issued. Third, documentation such as inspection reports can be supplied with the shipment when the customer's quality system requires traceability. Buyers should also confirm the quantity discount break points if the program is expected to scale, because locking in pricing early simplifies budgeting. If any specification is unclear, the fastest route is to send the drawing and let SIKETE's engineers confirm the correct item rather than guessing from a catalog page. That single step prevents the most common purchasing error: ordering a ground ball screw that is accurate enough but dimensionally incompatible with the housing.

ZHEJIANG SIKETE TECHNOLOGY CO., LTD. is a manufacturer-direct supplier, which means buyers communicate with the factory rather than through a chain of intermediaries. The company was founded in 2011 as a global automation solutions provider and has grown into a supplier of linear modules, ball screws, and linear motors for customers around the world. Working directly with the manufacturer shortens the feedback loop on technical questions, keeps pricing competitive, and makes it easier to obtain custom ground ball screw configurations. Quality control follows ISO procedures, production relies on advanced grinding equipment, and inspection reports are available to document the critical dimensions of each shipment. Fast response and genuine engineering support are part of the standard service model rather than an optional premium. To understand the depth of the organization behind the product, review the ABOUT page, which outlines the company's manufacturing philosophy and capabilities. For a broader view of how these components fit into complete automation systems, the HOME page shows the full product and application landscape.

OEM and ODM cooperation is actively welcomed, which is important for machine builders who need a partner rather than a vendor. When a customer's own branding or a modified mechanical interface is required, SIKETE can adapt the ground ball screw specification accordingly and keep it controlled through a part number. Consistent incoming quality is what makes that arrangement valuable, because a ground ball screw that varies from batch to batch will eventually cause assembly problems or field failures. Global shipping and documented inspection practices support customers who are far from the factory and cannot easily visit. Company news, exhibitions, and product demonstrations are published regularly, and the NEWS section is a useful way to track new capabilities. For a visual introduction to the manufacturing and product range, the VIDEO library provides demonstrations of SIKETE hardware in motion. Taken together, these strengths explain why so many precision equipment builders standardize on SIKETE as their ground ball screw source.

Requesting a quotation is straightforward and begins with the specification or drawing. SIKETE accepts inquiries by email, phone, WhatsApp, and WeChat, and the CONTACT page includes a contact form, a map, and an extensive FAQ covering products, ordering, shipping, and warranty topics. Most quotations are returned quickly, and complex custom ground ball screw requests are routed to an engineer for review rather than being priced mechanically. Customers can also request the technical catalog and the downloadable 2D and 3D files at the same time as the quote, which shortens the design cycle. If the application is still being defined, describing the load, stroke, speed, and required accuracy is enough to start the conversation. Samples can be arranged so that performance is confirmed before a volume commitment is made. Whether the requirement is a single replacement ground ball screw or a multi-year production program, the same engineering attention applies.

A ground ball screw has its raceway thread cut by precision grinding, while a rolled ball screw is formed by pressing the material into shape. Grinding removes material to create an accurate, smooth profile, giving the ground ball screw better lead accuracy, better surface finish, and tighter tolerance control. This is why semiconductor, metrology, and optical equipment almost always use a ground ball screw.

SIKETE produces ground ball screws with screw diameters from 3.0 mm to 15.0 mm and leads from 0.5 mm to 20 mm. Custom diameters and lengths are available on request. Both high alloy steel and stainless steel versions are offered depending on the environment.

Choose C3 accuracy class for semiconductor equipment, metrology instruments, and optical stages where micron-level errors matter. Choose C5 for general CNC machinery and factory automation where tolerances are measured in tens of microns. C3 has less backlash than C5, and with spacer-ball preload the backlash of a C3 ground ball screw can be reduced to nearly zero.

Backlash is the excess axial free motion between the nut and the screw that occurs without rotation, also called lost motion. When the axis reverses, the lost motion must be absorbed before the load actually moves, which creates positioning error. A ground ball screw with a tighter accuracy class and proper preload minimizes that error.

A C5 ground ball screw typically shows approximately 0.005 mm, or 0.0002 inch, of backlash. For many automation applications that value is acceptable. If the process requires tighter control, a C3 grade with spacer-ball preload is the appropriate upgrade.

Yes. SIKETE machines custom journals, threads, and keyways to the customer's drawing, and the drive side is delivered ready for support bearing installation. To receive an accurate quote, send a fully dimensioned drawing along with load, speed, and accuracy requirements. Samples can be produced for validation before volume production.

SIKETE offers spacer-ball preload and double-nut preload configurations. Spacer balls create a light interference that removes axial play almost completely, while a double nut allows preload to be adjusted. Selecting the right preload keeps the ground ball screw running cool while eliminating backlash at direction reversal.

Flanged ball nuts are the most popular choice because they mount easily to a housing or carriage. Other nut types are available as options when the mounting envelope is constrained. The nut type is encoded in the part number, so it should be confirmed during specification.

SIKETE provides a technical data PDF, a ZIP archive of 2D drawings, and a ZIP archive of 3D CAD STEP models. Having the STEP model lets designers verify clearances and bearing seats inside the assembly. Request these files together with your quotation to shorten the design cycle.

Standard inquiries are usually answered quickly, while complex custom ground ball screw requests are reviewed by an engineer before pricing is issued. Lead time then depends on whether the item is a stock configuration or requires custom machining. Sample orders are supported to confirm performance before a volume commitment.