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Barranca Diamond Products
Barranca Diamond Technical Library
Wet Polishing Guide
Procedures and suggestions for polishing lapidary materials.
Speed Guidelines
Diamond lapidary blade speed recommendations.
Sawing Guidelines
Diamond blade sawing recommendations.
Cutting Depth Guidelines
Cutting depth guidelines for stone & lapidary blades

Barranca Diamond troubleshooting ( trouble shooting ) made easy by the Diamond Saw Blade Depot. This Technical Library provided by Barranca Diamond Products will be able to answer any of your Barranca questions. If you have any other diamond saw blade and diamond blade product questions you can have them answered by our extensive online Troubleshooting Diamond Blade E-Book or

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WET POLISHING GUIDE

Wet Polishing Guide:
Petrified Wood, Opal, Agate and Other Gem Stones
Polishing Steps:
1 Cut or shape material to the desired surface or pattern using either a diamond blade or diamond cup wheel.
2 Using a clamping device, secure material to be polished to a proper work surface.
3 Remember, polishing is a process which takes time and requires that each grit size pad be used properly to achieve a quality finish.
4 Using the 50, 120, or 220 coarse grit pad, remove all rough scratches and cut marks. Smooth the surface as much as possible with these specific grit pads. The smoothing of the surface during this stage of polishing will determine the quality of the finish that will be achieved. After working the area, dry the surface to determine if all large scratches have been removed. Using a lumber crayon or pencil, mark the surface to determine the depth of the scratches remaining.
5 Once all large scratches have been sufficiently removed, the finer grit pads can be used to achieve the quality finish. The fine grit pads consist of 400, , 1800, and 3500. If more luster or color from the polished surface is desired, use the extremely fine 8500 grit pad.
After completing the polishing process, the following steps must be followed if a mirror finish is desired:
Make a paste of cerium, aluminum or tin oxide using water.
Apply paste to felt wheel.
Run felt wheel with slight pressure against the surface to generate heat.
After paste dries, polishing is complete.
Wash surface with water and dry.
The surface should have a high luster or finish. If the surface appears to have small scratches, repeat step 5. In some cases it may be necessary to repeat steps 4 & 5.
Important Points in the Polishing Process:
Barranca Diamond polishing pads are designed to be used solely with water to minimize the wear on the pads and prevent hazardous dust. (The use of water acts to cool the polishing pad material, flush away grindings, and eliminate hazardous dust). Always wear eye protection at all times.
Never skip grit sizes during the polishing process. Skipping grit sizes will result in an unsatisfactory finish to the stone.
Diamond polishing pads wear out prematurely due to overworking of the material or by not using a sufficient amount of water.
Failure to spend adequate time polishing with each grit size pad will result in an unsatisfactory finish.
Selection of the flexible rubber backer pad for shaping and curved work is highly recommended. Use the rigid backer pad for the straight edge and flat face material.
Flat 4" 100 mesh wheel can be used to plane down uneven surfaces, remove stubborn scratches and knock off saw nubs.

SPEED GUIDLINES

Lapidary Blade Speed Recommendations
Blade BD-297 BD-301 BD-303 Series
Recommended RPM Operating Range
in Surface Feet Per Minute
3000 - 3500 3000 - 4500 4500 - 6000
Blade Diameter Approximate Arbor Shaft RPM Range
4" (102mm) 2860 - 3340 2860 - 4300 4300 - 5730
5" (127mm) 2290 - 2670 2290 - 3440 3440 - 4580
6" (152mm) 1910 - 2230 1910 - 2870 2870 - 3820
7" (178mm) 1640 - 1910 1640 - 2460 2460 - 3270
8" (203mm) 1430 - 1670 1430 - 2150 2150 - 2870
9" (229mm) 1270 - 1490 1270 - 1910 1910 - 2550
10" (254mm) 1150 - 1340 1150 - 1720 1720 - 2290
12" (305mm) 960 - 1110 960 - 1430 1430 - 1910
14" (356mm) 820 - 960 820 - 1230 1230 - 1640
16" (406mm) 720 - 840 720 - 1070 1070 - 1430
18" (457mm) 640 - 740 640 - 960 960 - 1270
20" (508mm) 570 - 670 570 - 860 860 - 1150
24" (610mm) 480 - 560 480 - 720 720 - 960
30" (762mm) 380 - 450 380 - 570 570 - 760
36" (914mm) 320 - 370 320 - 480 480 - 640

DIAMOND BLADE SAWING GUIDELINES

To optimize productivity and blade life it is important to match the material to be cut with the proper blade. The following charts provide general diamond sawing data.
The Blade
Segment Bond Hardness Cutting Speed Blade Life
Harder Slower Longer
Softer Faster Shorter
Diamond Quality Cutting Speed Blade Life
Lower Slower Shorter
Higher Faster Longer
Diamond Concentration Cutting Speed Blade Life
Lower Faster Shorter
Higher Slower Longer
Segment Width Cutting Speed Blade Life
Thinner Faster Shorter
Thicker Slower Longer

The Job
Cutting Depth Cutting Speed Blade Life
Shallow Slower Longer
Deep Faster Shorter
Cutting Pressure (infeed) Cutting Speed Blade Life
Lower Slower Shorter
Higher Faster Longer
Material Hardness Cutting Speed Blade Life
Harder Slower Shorter
Softer Faster Longer
Material Abrasiveness Cutting Speed Blade Life
More Faster Shorter
Less Slower Longer

STONE & LAPIDARY BLADE CUTTING DEPTH GUIDELINES

Barrranca Diamond Concentrate
Diameter Cutting Depth
6" (152mm) 1-3/4" (45mm)
8" (203mm) 2-1/4" (57mm)
9" (229mm) 2-3/4" (70mm)
10" (254mm) 3-1/4" (83mm)
12" (305mm) 3-3/4" (95mm)
14" (356mm) 5" (127mm)
Cutting depth may vary depending
on the design of the saw.
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