Double Tuck Point Diamond Blade

Full Specifications

Seven sizes as published for this series. The table gives segment width, segment height and arbor hole, and all three read the same on every row; only the diameter changes from 100 to 230 mm. The listing publishes no rpm, no blade thickness, no diamond concentration and no bond hardness with this table, and it does not state a wet or a dry cutting mode.

Why the blade is built as a pair

A single tuck point blade puts one groove into a mortar joint. The mortar that has to come out sits on both sides of that groove, so the operator works the joint until the failed material lets go. The double tuck point blade takes the other route. The listing describes twin blades, two hot pressed thin kerf segmented diamond blades combined together, and states that the pair efficiently removes mortar joints in brick, block or concrete. Two blades cutting as one set put a kerf on each side of the joint instead of a single line down its middle.

That is the reason the two blades are combined rather than sold as two items. They share one arbor bore of 22.23 mm and they turn as one assembly, so the spacing between the two rims is fixed by the set itself. The operator does not have to hold two machines, or run the same machine down the joint a second time to widen the opening. The width the pair cuts is a property of the blade, and it repeats from joint to joint because nothing about the spacing shifts between passes.

The job the listing names is a narrow one, and it is worth stating plainly. This is a mortar joint tool for brick, block and concrete. It is not a general purpose cutting blade and the listing does not present it as one. The set is made for the one operation of taking a joint out of a masonry wall, and every figure in the table serves that operation: a 6.4 mm segment, an 8 or 10 mm segment height, and a bore that stays constant so the pair mounts and runs as the single unit it is built to be.

Thin kerf segments on both blades

The listing specifies thin kerf for each of the two blades, and it specifies that both are segmented. Thin kerf is not a detail here, it is what makes the pair workable. Two blades combined have to enter a mortar joint that was never cut for a wide tool, and the joint is only as wide as the mortar course between two bricks or two blocks. Keeping each blade thin is what lets the pair sit inside that opening while the two rims still stand far enough apart to take the joint out across its width.

Segmented means the rim is a row of separate diamond segments rather than one continuous band, and the gaps between them are part of the design rather than a gap in the finish. On a joint that is being cleared, those gaps give the ground mortar somewhere to go, so the rim keeps advancing instead of loading up against its own debris. Two segmented rims working one joint clear a channel on each side, and the material between the two channels is left with nothing holding it at the sides.

Both blades are hot pressed. The listing gives that as the process for the segments on this set, and it applies to the pair rather than to one blade of the two. Segment width is published as 6.4 mm and segment height as 8 or 10 mm, and those figures are the same on all seven diameters. So the rim geometry a buyer gets on the smallest size is the rim geometry on the largest size, and the difference between them is the diameter of the core the segments are fixed to.

Seven sizes, three columns that never move

The diameter column runs 100, 115, 125, 150, 180, 200 and 230 mm, which is the same ladder as 4, 4.5, 5, 6, 7, 8 and 9 inch. The item numbers 4HCBTP through 9HCBTP mark each of the seven. That column is the only one in the table that changes from row to row, and it is the column a buyer reads against the machine on site.

The other three columns are fixed. Segment width reads 6.4 mm on all seven rows. Segment height reads 8 / 10 mm on all seven rows. Arbor hole reads 22.23 mm on all seven rows. So choosing between the sizes is choosing a diameter and nothing else; the twin set, the segment and the bore are already settled by the series. There is no second bore to specify and no second segment width to weigh, which makes the order sheet short: one diameter, one quantity, and the label to print on the core.

The 22.23 mm bore is the same at 100 mm as it is at 230 mm, and that is what keeps the set a single product line rather than two. A buyer running several sizes on the same job does not have to think about which bore goes with which diameter, because there is only one. The diameter is the dial, and it moves within a range where the work is still mortar joint removal on brick, block and concrete, which is the job the listing publishes for every size in the table.

Private Label and Export Supply

The range is supplied under the GUSHI mark or made to order under a buyer’s own label. What can be set is the print on the core, the item numbering and the carton or sleeve print for the export carton. What stays as listed is the twin construction, the 6.4 mm segment width, the 8 or 10 mm segment height and the 22.23 mm bore, because the table publishes those as fixed at every diameter and the source offers no second option for any of them.

Inside the cutting range, the mortar joint work belongs to this double tuck point blade and to the single blade tuck point version; the twin set is the one built to open a joint on both sides in one pass, and the single blade is the one built to put a groove on one line. The brittle edge work belongs to the continuous rim, and the crack cleaning work to the V crack chaser. The family splits by the shape of the cut, and the shape of this cut is two kerfs standing apart at a fixed spacing on one arbor.

Frequently Asked Questions

What is a double tuck point blade?

It is a twin blade set. The listing describes it as twin blades, two hot pressed thin kerf segmented diamond blades combined together, built to remove mortar joints in brick, block or concrete. Both blades sit on the one arbor, so the pair works the joint as a single tool rather than as two separate cuts made one after the other.

How does a twin blade remove a mortar joint?

The two blades are combined so they cut together in one pass. Each blade is a thin kerf segmented blade, and the pair opens the joint across its width instead of running a single groove down one line. The listing states the job plainly: the twin blades efficiently remove mortar joints in brick, block or concrete.

Which materials does the double tuck point blade work on?

The listing names brick, block and concrete as the materials whose mortar joints the blade removes. Those three are the surfaces the twin set is published for. The listing does not name stone, tile, metal or wood for this blade, so the published material list stays at brick, block and concrete.

What diameters are available?

Seven sizes from 4 inch (100 mm) to 9 inch (230 mm): 100, 115, 125, 150, 180, 200 and 230 mm. The item numbers run 4HCBTP through 9HCBTP. Every size shares the same segment width, segment height and arbor, so the diameter is the only column that changes from row to row.

What is the segment width, height and arbor of the double tuck point blade?

Segment width is 6.4 mm, the segment height is 8 or 10 mm and the arbor hole is 22.23 mm. Those three figures are the same on all seven diameters, from the 100 mm size through to the 230 mm size, so the table reads as one fixed pair of blades offered at seven diameters.

Is it one blade or two?

It is two blades. The listing calls it twin blades and states that two hot pressed thin kerf segmented diamond blades are combined together. Both blades are segmented and both are thin kerf, and they are supplied as one combined set on the 22.23 mm arbor rather than as two blades to be bought separately.

Why thin kerf segments on a twin blade?

Thin kerf is what the listing specifies for each of the two blades in the set. Two thin kerf blades combined keep the pair narrow enough to enter a mortar joint while still opening the joint across its width. The segment width is published as 6.4 mm and the segment height as 8 or 10 mm on every one of the seven diameters.