Saw cords made of saw beads threaded on a steel cord, where the saw beads are separated by polymer spacers. The saw beads have a metal sleeve of which the outer surface is covered with an abrasive layer. The inner surface of the sleeve has with two sets of parallel grooves in a first and second axial part of the sleeve. The two sets of parallel grooves differ in at least one of the groove angle, the groove offset or the groove spacing, thereby preventing axial movement of the sleeve and blocking the rotation of the saw bead.

Saw cords made of saw beads threaded on a steel cord, where the saw beads are separated by polymer spacers. The saw beads have a metal sleeve of which the outer surface is covered with an abrasive layer. The inner surface of the sleeve has with two sets of parallel grooves in a first and second axial part of the sleeve. The two sets of parallel grooves differ in at least one of the groove angle, the groove offset or the groove spacing, thereby preventing axial movement of the sleeve and blocking the rotation of the saw bead.

Embodiments herein provide an abrasive saw chain that includes drive links and tie straps coupled to one another. Cutting elements, such as diamond cutting elements, may be coupled to upper surfaces of respective drive links. An upper surface of the tie strap may contact a lower surface of a cutting element to provide support for the cutting element. The tie strap may include a limiting feature to contact front and/or back surfaces of adjacent cutting elements when the links traverse an elongate portion of a guide bar. Alternatively, or additionally, the drive links may include a mating surface that contacts a mating surface of an adjacent drive link when the drive links traverse the elongate portion of the guide bar. Other embodiments may be described and/or claimed.

Embodiments herein provide an abrasive saw chain that includes drive links and tie straps coupled to one another. Cutting elements, such as diamond cutting elements, may be coupled to upper surfaces of respective drive links. An upper surface of the tie strap may contact a lower surface of a cutting element to provide support for the cutting element. The tie strap may include a limiting feature to contact front and/or back surfaces of adjacent cutting elements when the links traverse an elongate portion of a guide bar. Alternatively, or additionally, the drive links may include a mating surface that contacts a mating surface of an adjacent drive link when the drive links traverse the elongate portion of the guide bar. Other embodiments may be described and/or claimed.

The present invention relates to a wall or floor chain sawing device (1), comprising a chain bar assembly (37) which in turn comprises a chain bar (2) having a longitudinal extension (17) and guiding a chain (3) at least partly around its perimeter. The chain bar assembly (37) further comprises a chain bar housing (6) that is attached to, and partially covers, the chain bar (2) and the chain (3). The chain sawing device (1) comprises a motor (9), a track interface (7) that is arranged to co-operate with a guiding track (8), and a power transmission arrangement (10) that is adapted to transfer a motion from said motor (9) to the chain (3). The sawing device (1) comprises a first pivotable support rod (12) and a second pivotable support rod (13), where each pivotable support rod (12, 13) has a corresponding first end (12a, 13a) and a second end (12b, 13b). Each first end (12a, 13a) is at least indirectly pivotably attached to the motor (9), and each second end (12b, 13b) is at least indirectly pivotably attached to the chain bar assembly (37).

Monofilament metal saw wire for a wire saw, wherein the saw wire being provided with a plurality of crimps. The crimps are arranged in at least two different planes, such that, when measured, between measuring rods of a micrometer, over a length comprising crimps in at least two different planes, a circumscribed enveloping D diameter of the saw wire is between 1.05 and 1.50 times a diameter d of the saw wire itself.

Monofilament metal saw wire for a wire saw, wherein the saw wire being provided with a plurality of crimps. The crimps are arranged in at least two different planes, such that, when measured, between measuring rods of a micrometer, over a length comprising crimps in at least two different planes, a circumscribed enveloping D diameter of the saw wire is between 1.05 and 1.50 times a diameter d of the saw wire itself.

This method of cutting a high-hardness material with a multi-wire saw includes the steps of: (A) providing at least one ingot which includes a body portion 10a with two ends and a low-quality crystal portion 10e that is located at only one of the two ends of the body portion; (B) fixing the at least one ingot onto a fixing base; and (C) slicing the at least one ingot by moving the ingot with respect to a saw wire so that the saw wire does not contact with the low-quality crystal portion 10e of the at least one ingot but does contact with its body portion 10a.

This method of cutting a high-hardness material with a multi-wire saw includes the steps of: (A) providing at least one ingot which includes a body portion 10a with two ends and a low-quality crystal portion 10e that is located at only one of the two ends of the body portion; (B) fixing the at least one ingot onto a fixing base; and (C) slicing the at least one ingot by moving the ingot with respect to a saw wire so that the saw wire does not contact with the low-quality crystal portion 10e of the at least one ingot but does contact with its body portion 10a.

A trenching device rotating a trenching chain through a substrate to form a trench. The trenching device including a power unit, a drive unit including a belt drive system, and a trenching unit including a trenching chain and configured to rotate the trenching chain about a trenching bar.