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Diamond Products CSE12 にも：取扱説明書 (20 ページ)

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NOTE: The cutting technique for concrete is very different from a wood cutting chain saw, where cutting

with the nose of the guide bar must be avoided. With a wood cutting chain saw, the hook-shaped saw

teeth can easily grab the wood fibers, leading to a kickback hazard. Diamond segments which are

cutting concrete do not behave in the same way. They simply abrade the workpiece without grabbing so

aggressively. Still, always hold the saw firmly with both hands to resist kickback forces.

Beginning the cut:

With the chain running at full speed, slowly approach the workpiece with the nose of the guide bar and

plunge in. Hold the saw as straight as possible.

Start by making a shallow, 10 to 20mm outline cut along the entire cutting line with the nose of the guide

bar. Then plunge in deeper and complete the cut.

While cutting, keep steady feed pressure on the tool to prevent the chain from chattering and bouncing.

Use enough pressure so that the motor audibly slows by about 20-30%. This will keep the diamonds

sharp. Use the bumper spike for leverage to assist in keeping pressure on the cutting face.

Square cut-outs:

When performing large square cut-outs, after the initial shallow outline cut, carefully hold the saw as

squarely as possible and plunge cut each of the corners all of the way through.

Make the bottom horizontal cut first, then drive some wedges into kerf of the bottom if the cut section is

large and heavy. Next, perform the 2 side vertical cuts. Make the top horizontal cut last.

This cutting sequence will avoid the chain being pinched by the workpiece.

WARNING: Ensure that appropriate bracing is in place to control falling of the concrete as the final cut

is completed. Concrete is extremely heavy and could lead to severe injury if it falls in an uncontrolled

manner.

Pipe cutting:

When cutting a concrete pipe, support the pipe so that it will not pinch the chain. Plunge straight

through the pipe, leaving a tab of uncut material at the very top, which will keep the pipe stable while

cutting. Cut this tab last to complete the cut.

WEARING PARTS

Diamond Chain

The diamond segments will wear away with normal use. In addition, the chain itself will stretch due to

accumulated wear of each joint of the chain. Inspect each segment of the chain before each use, noting

any segment damage or undue wear.

Guide Bar

The guide bar rails will wear from abrasion with the chain. If the saw tends to cut to one side, the rails

have worn unevenly. The guide bar rails can be re-squared by carefully sanding on a bench mounted belt

sander. If the chain's drive links are touching the bottom of the guide bar grooves, the guide bar must be

replaced. Running a good chain on worn out guide bar will prematurely wear out its drive links and the

motor will overload easily from the excessive friction.

Extra life can be had from the guide bar by flipping it over to the other side, since the bottom wears faster

than the top. It is a good practice to flip the guide bar each time you replace a chain. Generally, the guide

bar will need to be replaced after about 3 chains.