A Flex-Hone® is a flexible honing tool with abrasive globes mounted on nylon filaments. It produces a uniform cross-hatch finish in bores, removes burrs, and improves surface quality. Main applications: cylinder finishing, valve guides, hydraulic bores, cross-hole deburring. Detailed article: Honing explained.

The grit size depends on the task: 60–120 for aggressive deburring, 180–240 for standard finishing (cylinders, valve guides), 320–600 for fine finishing and surface improvement, 800+ for a polishing effect. Most users start with 240 SC (silicon carbide). Detailed guide: Choosing the right grit.

General rule: The larger the diameter, the lower the RPM. Guidelines: 4–20 mm → 600–1,200 RPM, 20–80 mm → 300–600 RPM, 80–200 mm → 100–300 RPM. Important: Always insert the tool while the spindle is running! Complete parameter table: RPM & Parameters.

Yes, absolutely. Honing oil or water-based metalworking fluid is mandatory. Dry honing causes the abrasive globes to glaze (no material removal), overheating, and accelerated tool wear. Mineral-based honing oil is ideal. Alternatives: water-based metalworking fluid or cutting oil. Never use WD-40 or brake cleaner.

Simply order the nominal size of your bore – the required oversize is built in at the factory; in its free state the abrasive body is larger than the nominal size. Example: 50 mm bore → Flex-Hone® 50 mm. Only for in-between dimensions choose the next larger standard size (e.g. 86 mm → 89 mm) – undersized tools will not make contact.

SC (Silicon Carbide): Standard for steel, cast iron – 80 % of all applications. AO (Aluminum Oxide): For aluminum, copper, brass – softer materials. BC (Boron Carbide): For hardened steels, ceramic coatings. D (Diamond): For Nikasil, hard chrome, extreme hardness. More details: Abrasive guide.

Yes – this is actually the preferred application for reproducible production results. Program RPM, stroke feed rate, and dwell time. Recommendation: use a floating holder so the tool compensates for alignment tolerances. The cylindrical shank fits any standard collet chuck.

Depends on material, grit, and processing time: SC 240 on cast iron → approx. 50–100 motorcycle cylinders. SC 120 on steel → approx. 30–60 bores. Diamond on Nikasil → approx. 20–40 cylinders. The globes wear evenly – when the diameter drops below the bore size, it is time to replace.

PrecisionPro offers seven main categories: Cup brushes (surface finishing), Disc brushes (edges/grooves), Tube brushes (bores/pipes), Miniature brushes (small bores), NamPower® (CNC finishing), Parts-washing brushes (wet cleaning), Flow-through brushes (recesses). Full comparison: Industrial brushes overview.

NamPower® contains abrasive grain (SiC, AO, or diamond) in its nylon filaments – it is a grinding tool with controlled material removal. Standard disc brushes (wire or plain nylon) clean and polish but do not remove material in a controlled manner. NamPower® is optimized for CNC use, while disc brushes are more suited for handheld machines. Details: NamPower® abrasive brushes.

Wire (steel, stainless steel, brass): Aggressive removal – rust, scale, slag, old coatings. Nylon (with or without abrasive grain): Gentler – deburring, finishing, sensitive surfaces. Rule of thumb: If you do not want to alter the surface, use nylon. If you want to remove material, use wire.

The brush should be 5–15 % larger than the bore diameter. Example: 30 mm bore → 32–34 mm brush. Too small: no contact. Too large: jams. For cleaning applications, aim for the upper range (15 %); for deburring, be more conservative (5–10 %).

Yes. Miniature brushes with nylon fill (contamination-free, metal-free) are suitable for medical technology applications: implants, cannulae, prostheses. Nylon filaments produce no metal particles. For FDA/EU compliance: nylon PA6.12 or PP fill, documented traceability.

Yes. In addition to our standard range (over 2,700 variants), we manufacture custom brushes to your drawing or specification. Options include: custom diameters, custom lengths, special fill materials, and customer-specific shanks. Send your drawing or description to our technical sales team – you will receive a feasibility assessment and quote within 2–3 business days.

Deburring is the removal of sharp edges and material protrusions (burrs) that form during machining processes (drilling, milling, stamping). Burrs cause injuries, damage sealing surfaces, promote corrosion, and compromise downstream processes. In detail: What is deburring?

Recommended combination: 1) Flex-Hone® through the main bore → deburrs intersection edges. 2) Miniature brush into the cross hole → removes residual burrs. Follow with compressed air to blow out debris. Details: Cross-hole deburring.

Yes – with NamPower® brushes for flat surfaces/edges and Flex-Hone® for bores. Both tools have standard shanks and are integrated into the CNC process as tool changes. Typical saving: 30–60 seconds per workpiece. ROI: Pays for itself after the first batch. More: NamPower® abrasive brushes.

Edge rounding means giving sharp edges not just a burr-free finish, but a defined radius (e.g. R 0.2 mm). Reasons: injury prevention, coating adhesion (sharp edges cause coating delamination), fatigue strength (reducing notch effect), visual quality. NamPower® AD brushes produce repeatable edge rounding in the CNC process.

TEM (gas explosion in a sealed chamber) deburrs all areas simultaneously – including hard-to-reach ones. However: high investment costs, no edge rounding, only economical for series production. Brush tools (Flex-Hone®, NamPower®, miniature brushes) are more flexible, more affordable, and simultaneously produce a surface finish. TEM is only worthwhile at very high volumes with extremely complex geometries.

Yes. PrecisionPro offers B2B volume pricing from 5 units on all standard products. Volume prices are displayed directly in the shop. For bulk orders (100+ units), we prepare individual quotes with additional discounts. Contact our sales team for a tailored offer.

Standard items (over 2,700 variants) are available from stock. Shipping: 1–3 business days within Germany, 3–5 business days internationally (EU). Express shipping available. Custom orders: lead time by arrangement, typically 2–4 weeks.

Yes. We ship to all EU countries and Switzerland. For Switzerland: customs clearance and VAT calculation are handled automatically. Shipping costs are displayed at checkout. Key accounts with regular demand receive special terms upon request.

Yes. For industrial users who want to evaluate a tool before placing a production order, we offer single-unit orders. Alternatively: contact our technical sales team – we will recommend the right specification based on your application and supply a test sample.

Yes – free of charge and with no obligation. Our technical team advises on tool selection, parameter settings, and process optimization. Send us your requirements (material, bore size, desired surface finish, batch size) and we will recommend the optimal solution.

By email, phone, or via the contact form on every Knowledge Base page. We typically respond within one business day. For urgent inquiries: phone (available Mon–Fri). Contact details can be found in the footer of every page or use the button below.