Tungsten Carbide Grinding Block, Star Flail

ASSEMBLY INSTRUCTIONS/OPERATIONS

Tungsten Carbide Grinding Block

This multi-accessory attachment is most often utilized on larger concrete grinding projects where increased production and service life are required. The block utilizes tungsten carbide balls approximately 1/16 inch diameter that are deposited in a molten matrix material during the manufacturing process at a controlled rate. The end effect is a multi layer deposit of tungsten carbide balls in the matrix material. As the softer matrix material wears with use, it exposes a new layer of fresh tungsten carbide balls to continue the grinding process.The tungsten carbide grinding block is considerably more aggressive than the C10 silicon carbide grinding stone.With the ability to renew itself during usage, the normal life expectancy for this accessory can approach several hundred hours.The nominal dimensions for the tungsten carbide grinding block is 2" x 2" x 4" and is secured to the machine with a plastic wedge. FIGURE 5.

insert flails. In turn, these costs must be compared to anticipated service life. All flails will eventually wear to the point of requiring replacement.The amount of unproductive time spent to replace worn flails on a job can be substantially greater than the actual replacement cost of many flails. It then becomes a balance between purchase cost, productivity, service life and labor cost.

c)Surface finish and texture. The finest grained surface finish available from the scarifying process is comparable to a “swept or broomed” like finish. If a smooth, flat finish is desired, the scarifying process must be followed with a grinding or polishing type process. Many job requirements may call for large amounts of material to be removed, but followed with additional specifications requiring a finer surface finish or texture. Many times these jobs dictate the use of an aggressive flail configuration because of productivity and cost considerations. Less aggressive flail configurations can then be utilized for the final finishing sequence. Generally speaking, the more aggressive the flail configurations, the more coarse the resulting finish and texture.

Many flail configurations are available to meet a wide variety of job applications and surface material specifications. To give additional perspective to each configuration, a rating system of 1 to 10 (10 being highest) has been devised.

FIGURE 5

Scarifier Blocks

These multi-accessory attachments are comprised of flails and spacer washers secured in a rigid steel case. FIGURE

6.Rotation of the multi-accessory disc causes the flails to impact against the work surface with a variety of results. Scarifier blocks are secured to the machine with plastic wedges.

Several factors directly affect the selection of a flail design for a specific job application:

a)The type and amount of material to be removed from the work surface. Materials of higher yield and tensile strengths along with the actual volume of material to be removed will generally be the first factors under consideration.

b)Purchase cost versus service life. The original purchase cost of plain, heat-treated steel flails must be compared against the substantially higher costs of the tungsten carbide

FIGURE 6

Star Flail

The star flail is manufactured from high carbon steel that is through hardened for additional service life. It is highly effective for light cleaning or scarifying and delivers a finer surface finish texture. FIGURE 7.

SFG10E ELECTRIC SURFACE GRINDER — OPERATION AND PARTS MANUAL — REV. #2 (05/28/09) — PAGE 14