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Carbide single roller burnishing tools (SR series)

Plunger Type Single Roller Burnishing Tools        (SRP typer)
Outside-Surface Single -Roller Burnishing Tool    (SRL type) 
Multi-Surface –Single Roller Burnishing Too
l         (SRl series)
Diamond Burnishing Tools                                          (DB series)

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Plunger Type Carbide Single Roller Burnishing Tools (SRP series)

  • Are adaptable for use on lathes screw machines. VTL machines NC & CNC machines , machining centers and turning centers.
  • Produce high quality 5 to 8 microinch (0.13-0.20 um) finishes.
  • Save machine time and set-up costs through single machining operations.
  • Have feeds and speeds comparable to -turning tools.

 Single -Roller Burnishing Tools not only can burnish a linear O.D. surface but they can also finish any O.D. surface configuration containing contours, fillets, radii and grooves. And with the speed of a cutting tool to a 5 microinch (0.13 μm) finish. They can also burnish large I.D. surfaces with the same microinch quality by simply mounting the tool on a boring bar. Plane surfaces are even easier to roller burnish since burnishing can be accomplished in both directions (right-to-left then left-to-right). If the burnishing is accomplished at the machine cutting speed it can be done in half the time usually required.

 

Custom design 

Most Single Roller Burnishing Tools are individually designed and manufactured to customer specifications. Yet each tool can be mounted on standard machines, such as VTL machines, screw and boring machines, thereby eliminating the need for any additional investment. The Custom design compensates for machine speeds tooling requirements and non-linear surfaces. 

The Single  roller burnishing tool consists of two parts : 1) a spring-loaded head assembly and 2) a shank. The head assembly contains the Single -roller, its friction and thrust bearings, an axle, washers and the necessary hardware to make it functional. The assembly is then spring loaded to its shaft, making the head a floating tool. 

The radius of each burnishing roller is individually designed to conform to the profile of the work piece to be finished. However it should be kept in mind that the roller radius also affects feed rate. Many head assemblies are manufactured to individual product specifications supplied by the customer. Drawings of the turret or tool holder should be furnished with a request for quotation. 

We manufacture both right-to-left and left-to-right Single Roller burnishers as well as plunger or vertical type burnishers for linear surface finishing. 

The design is such that the Single Roller burnishing tool functions with the work piece rotating, and best results can be accomplished on metals where the hardness does not exceed 40 Rockwell “C”.

Single Roller burnishing tools are ideal for use on Numerically Controlled (NC) and Computer-Numerically-Controlled (CNC) machines since they can be programmed to burnish through non-linear surfaces.

 

Single-roller burnishing applications are virtually unlimited 

The ideal applications for the Single-roller burnishers are shafts and cylinders of non-uniform cross section. Shafts with radii, fillets and grooves, and cylinders with undercuts, tapers and contours are perfect applications. They can be finished in single machining operations, thereby saving machine time and set-up costs. 

Another successful application is the burnishing of axles and shafts requiring high-quality finishes.

 

Outside-Surface Single -Roller Burnishing Tool (SRL type) 

 

 

 

 

 

·        Save machine time and set-up costs by burnishing a variety of part surfaces with one tool.

·        Suitable for most NC/CNC turning centers.

·        Produce high-quality 5 to 8 microinch finishes (0.13-0.20 um)

·        Burnish at feeds and speeds comparable to cutting tools.

·        Improve part wear through cold working.  

Now you can burnish all outside surfaces with one tool 

The Outside-Surface Single -Roller Burnishing Tool is designed to be mounted in the turret of an NC/CNC turning center. The path of the burnishing tool is then programmed to be identical to that of the cutting tool used prior to burnishing. The Outside-Surface Tool has a 1-inch square shank for turret mounting. Tools for both right and left-hand feed applications are available. 

A 5 to 8 microinch finish is practical at a feed rate double that of the cutting tool, Speeds consistent with good machining practices are recommended, Coolant is recommended for improved tool life.

 

Burnishing multiple surfaces after turning operations 

The Outside-Surface Tool consists of two parts:

1)     a spring loaded head assembly and   

2)     a shank

The head assembly contains the -roller, its friction and thrust bearings, an axle, washers and the necessary hardware to make it functional. The assembly is then spring-loaded to its shaft, making the head a floating tool.  

The illustration shows a part with multiple surfaces being burnished automatically after the turning operation. The Outside-Surface Tool has built-in offset for roll and part centerline alignment so that the six different surfaces shown in the illustration can be easily burnished.

 

Multi-Surface –Carbide Single Roller Burnishing Tool (SRl series)

·        Save machine time and set-up costs by burnishing multi-surface parts on NC/CNC machines with one tool.

·        Produce high-quality, 5. To 8. micro-inch finishes (0.13-0.20μm).

·        Burnish at feeds and speeds comparable to cutting tools.

·        Improve part wear through cold working.

 

Now you can burnish ID’s, OD’s, fillets or contours, shoulders & bar ends with one tool 

The Multi-Surface Single Roller Burnishing Tool is designed to be positioned in the boring station of an NC/CNC machine. The path of the burnishing tool is then programmed to identical to that of the cutting tool used prior to burnishing. The Multi-Surface Tool has a unique design which permits the burnishing roller to be spring loaded in two directions. This allows the roller to exert a uniform pressure on the part regardless of the part’s shape. The result is a uniform low micro finish.

Most outside diameters, bar ends & inside diameters greater than 2.5 inches can be burnished automatically after boring or turning. In addition, fillets, contours, radii or shoulders can be automatically burnished by machine programming. 

A 5 to 8 microinch finish is practical at a feed rate double that of the cutting tool. Speeds consistent with good machining practices are recommended. Coolant is not required, but is recommended when used for other machining operations.

 

Perform multiple burnishing operations just as you would cutting operations

The illustrations show a part being burnished automatically in stages.

In illustrations #1, the inside diameter is being burnished.

In #2, a fillet between the inside wall and the part bottom is being burnished.

In #3, the part end is being burnished.

In #4, a shoulder is being burnished.

Of course, the OD beyond the shoulder would be the next surface to be burnished.


Diamond Burnishing Tools (DB series) 

·        For most surfaces under 40Rc. The tool can be used on hard surfaces upto 62Rc

·        Diamond stem  is an economical throw away

·        For use in linear surfaces

·        For normal burnishing applications where tool can be positioned on center at 90 degrees to centerline.

The Diamond Burnishing Tool is made with a selected diamond suitable for burnishing machined or ground surfaces to a 2 to 8 micro finish on most metals. Cast iron can also be diamond burnished to between 8 and 15 RMS.

The Diamond Burnishing Tool is designed for use in the tool post of a lathe or similar machine. The tool holder should be set in the tool post so that the diamond contacts the work at the center of the shaft or part and at 90° angle to the surface of the shaft or part to be burnished.

 

Tool set up

The diamond stem is mounted in the holder under spring tension with an approximate 0.250” override. It is suggested when setting up a job, you bring the diamond against the work without the spindle running, feed the tool into the work until you compress the spring approximately 0.230”, then back off the tool approximately 0.031” to allow for a free float of the diamond in the holder. Do not compress diamond stem and spring until solid. Diamond failure may occur.

Since the tool is spring loaded, it is necessary that you feed the tool against the surface being finished and remove the tool from the surface being finished. Do not try to feed the tool on or off the work or do not try to use the tool for finishing intermittent surfaces.

 

Part preparation

A finish of approximately 80 to 100 RMS. should be machined or ground on the part prior to burnishing. This can usually be accomplished with a cutting tool having a 1/32” radius on the cutting edge with a feed rate of 0.006” to 0.008” per revolution. For cast steel parts, a slightly larger radius and a slower feed is recommended.

 

Machine feed & speed setting

 Usually the Diamond Tool is fed at one half the feed of the cutting tool although the finish required will have some bearing as to the correct feed needed to produce satisfactory results. To produce a 5 to 8 micro inch finish with the Diamond Burnishing Tool, set the machine at a feed rate of approximately 0.003” to 0.004” per revolution with a speed up to 750 surface feet a minute or less, depending upon the machine capability. Be sure to start the rotation of the spindle and the feed at the same time. If you start the spindle running and do not engage the feed, the tool will leave a mark on the part.

 

Coolant required

A coolant of any type that is on the machine may be used. Do not run the tool without coolant.

For additional or more specific information, please furnish print with complete details and, if possible, proposed part preparation.