LV203zz RV203/17 17X58X25mm V Groove Pulley Double Row Ball Guide Roller Track Roller Bearing

Here is an English product-profile / technical overview of the LV (RV) Series V-Groove Guide Roller Bearings, based on the parameter table you provided plus additional feature info from related spec sources. If you want, I can also produce a brochure-style version.

LV(RV) Series V-Groove Guide Roller Bearings - Overview

The LV (also called RV) Series V-Groove Guide Roller Bearings are specially built for guiding and supporting motion along cylindrical guide rails or rails with a 120° V-profile. They combine rolling bearing support with guiding functionality, suitable for applications needing both longitudinal motion and guidance (e.g. heavy duty tracks, mobile equipment, or wire straightening machines).

Key Construction Features & Design Highlights

• Double-row angular contact ball bearing internal structure: The LV series uses a double-row angular contact ball bearing base, which gives better load capacity (especially for combined or axial/ radial loads) and rigidity. ()

• Thickened outer ring and V-grooved outer surface: The outer ring is made robust to absorb load, and the V-groove profile ensures proper engagement with the guide rail. ()

• Precise machining of groove surface: The V-groove surface is finely ground, achieving low surface roughness (e.g. Ra 0.32) and good parallelism with the mounting plane of the inner ring. This reduces friction and improves bearing life. ()

• Sealing / shields: Some models are supplied with metal shields ("ZZ" suffix) to prevent dirt ingress; others have rubber seals (e.g. "2RS" suffix) depending on environment. ()

• Material & lubrication: Made from high quality bearing steel (often GCr15 or equivalent), heat treated, precision ground. Greased with multi-purpose or high grade grease for long service. ()

• Mounting flexibility: Available with either concentric or eccentric shafts/pivots, which helps in setup / preload adjustments. ()

Dimensional & Load / Performance Data

Below are selected dimensions and performance parameters of typical models in the LV (RV) series.

*The "A" dimension is measured along the outer ring V-groove profile; α is the included angle of the V profile; "Chamfer r/min" gives the edge chamfer radius; weights are approximate and may vary with seal/shield type.

Applications

These LV(RV) V-groove guide rollers are suitable for:

• Heavy-duty guide systems and tracks

• Mobile equipment, trolleys, carts that roll along rails

• Wire straightening machines, cable or rope guides

• Machinery or automation systems needing guided linear motion along rails (cylindrical rails or fixed 120° V Rails)

• Any system where you want both guiding and bearing in one unit, to reduce component count and simplify installation

Advantages & Use-Considerations

Advantages:

• Lower friction and wear due to precision ground V-groove that is parallel to inner mounting plane → more consistent contact, smoother motion. ()

• Higher load capacity due to double-row angular contact bearing design + thick outer ring. ()

• Flexible installation: can use eccentric or concentric shafts to adjust preload and fit. ()

• Good environmental protection (shielded or sealed; resistant steel and grease) in many models.

Design / selection notes:

• Match the V-groove geometry (angle, radius) of the bearing with that of the guide rail carefully. Mismatch can cause uneven load, noise, wear.

• Consider whether the undercut on the bottom of the groove (tool retraction groove) is acceptable in your application; some models include it, others can be supplied without. ()

• Degree of sealing (ZZ vs 2RS) affects operating environment (dust, moisture) and running resistance.

• Lubrication is important: good grease, regular relubrication (if applicable) helps extend life.

• Operating speed should be considered; larger rollers with higher mass (outer diameter, width) will have more inertia.

If you like, I can prepare a concise technical spec sheet (one-page) for a particular LV model (for example LV201ZZ) suitable for inclusion in your catalog.