STR-21Т UNIVERSAL ROTARY COLD ROOT ROLLING TOOL

Cold root rolling tool is a tool for cold root rolling of threads. It allows surface deformation of the root radius of a pre-cut thread in a threaded joint. 14

Operating principle: A hardened roller, similar in profile to the thread to be produced, is placed in contact with the root radius of the tapered thread. Pressure is then applied to force the roller into the shear surface of the root radius, displacing and cold deforming the surface material.

Rotary roller burnishing tool for external surfaces with die steel rollers is installed in the turret head of the CNC lathe machine center or tool post of the conventional lathe.

Workpiece surfaces are rolled to an accuracy of Ra 0.1 using speed rates corresponding to finishing methods.

Thread root rolling is performed with an interchangeable roller with a radius corresponding to the radius of the thread profile depression.

The roller can be adjusted in several axes, including the possibility of adjusting the roller to the thread angle.

The maximum spring force is 120-140kg (1200 - 1400 N).

The tool is available in several versions

STR21T-25x25

STR21T-20x20

STR21T-32x25

The presence of an elastic element ensures a constant rolling force at any point on the work surface.

The rotary single-roller tool is simple and versatile, but requires a significant working force which is fully absorbed by the machine's assemblies.

The change in surface size during rolling is caused by volume deformation of the workpiece due to micro-roughness elimination.

The reverse stroke should not be used as a working stroke, since repeated passes in opposite directions can result in excessive deformation of the surface layer.

Deep rolling increases the fatigue limit of parts by 80% or more, having a favorable effect on part performance.

Reducing machining costs:

Exclude nonproductive operations and auxiliary equipment items.

Burnishing on CNC lathe machine centers and conventional lathes.

Finish the surface from Ra 0.6 to Ra 0.1.

Economical tool life with die steel rollers.

Roller burnishing is a surface finishing technique in which hardened, highly polished steel rollers are brought into

pressure contact with a softer workpiece single point diamond turning,precision surface treatment,diamond turning, ultra-precision machining, Rullatori a rullo singolo, rullatura di superfici cilindriche, 
R2R, precision turning, cogsdill, ecoroll tool, yamasa tools, yamato, sugino, zeus, wenaroll, elliott-tool, 
machine, diamond tool feed, radius of the diamond tool , precision roller , High quality surface finish,
diamond tip, Suitable for hardened steels and high-strength materials,
One tool can be used for different burnishing applications, burnishing tips,
Burnishing speed, DIAMOND TIP VERSIONS, burnish plane surfaces, shoulder burnishing,
BURNISHING HIGH-STRENGTH MATERIALS, internal burnishing of bores,
burnishing of larger diameters, polishing, superfinishing,
honing or hardening, Surface after burnishing, roughness profile, burnished surface, spring force,
initial surface roughness, burnishing process, Replace the diamond tip, Burnishing result,
Wear of the diamond tip, Change of the diamond tip,
Prazisionswerkzeuge, Target surface Rz, smooth and resistant surface,
rough peaks flow, cold deformation of the edge layer,
Kaltumformung der Randschicht, Oberflache nach dem Glatten , TOP-CLASS SURFACE QUALITY, rolls for burnishing surfaces, roller-burnishing, отделочное накатывание,
чистовое обкатывание роликами; чистовое раскатывание, полирование путём наклёпа,
роликовый накатник, роликовая раскатка, single-roll burnishing tool,
однороликовая обкатка, Burnished workpiece, honing or lapping, cost-effective burnishing,
different burnishing applications, surface plastic deformation