COMPETENCE IN PRECISION AND QUALITY STEP DRILLS

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Osborn Fowler
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1 COMPETENCE IN PRECISION AND QUALITY STEP DRILLS

Product information The flutes of new RUKO high performance step drills are CBN ground from the solid hardened form.

And, with higher dimensional precision the drills will last considerably longer while maintaining the precise process tolerances. 1.

edges and reduces built-up edges and cold weld marks. Due to these special features, cutting performance and tool life are extended significantly. 2.

Each step is axially CBN relief ground. This means the cutting edge is always the highest point of the axial cutting axis. 4. The cutting edge of each step has relief angle.

Radially adjusted relief produced by CBN grinding Product application 1.

2 Product information The flutes of new RUKO high performance step drills are CBN ground from the solid hardened form. Because CBN (cubical boron nitride) is a much harder abrasive than even silicium carbide or corundum, a better and sharper cutting edge is achieved - without burrs. And, with higher dimensional precision the drills will last considerably longer while maintaining the precise process tolerances. 1. CBN ground spiral flutes enable very sharp and burr-free cutting edges compared to the ordinary milled flutes. long, non-breaking chips will be removed easily. edges and reduces built-up edges and cold weld marks. Due to these special features, cutting performance and tool life are extended significantly. 2. Each step has a radially adjusted relief produced by CBN grinding that relates directly to the diameter of the step. This means the cutting edge is always the highest point of the diameter. 3. Each step is axially CBN relief ground. This means the cutting edge is always the highest point of the axial cutting axis. 4. The cutting edge of each step has relief angle. This means the cutting edge is also the highest point in advance direction. 5. The CBN ground bit ensures centering and spot-drilling even in thin-walled material. 1. CBN ground spiral flute 2. Radially adjusted relief produced by CBN grinding Product application 1. The ideal tool for sheet metal working in the following sectors of industries: electrical (size 4 + size 9), sanitary engineering and heating technics (size 6 + size 7) or automotive, mechanical engineering, aviation (size 0/5, size 0/9, size 1, size 2, size 3, size 5) and switching systems (size 0/9k, size 1k, size 2k) up to 2 sheet thickness. 2. This tough tool is suitable for all standard industrial materials: nonferrous metal, special steel, thermoplastics and duroplastics as well as sheet metals up to 4 thickness. 3. This durable and versatile tool will center, spot-drill, bore and debur - all in one smooth, high performance working cycle. 4. By using RUKO cutting spray or RUKO cutting paste tool life will be considerably prolonged. 3. Axially relief produced by CBN grinding 4. CBN ground relief angle 5. CBN ground bit DIN 1412 C

3 Step drills HSS, CBN ground, spiral fluted Point cut: work s specification DIN 1412 C Point- / Step angle: 118 / 90 Surface: bright in plastic tubes of 1 Step drills HSS Co 5, CBN ground, spiral fluted Point cut: work s specification with split point DIN 1412 C Point- / Step angle: 118 / 90 Surface: bright in plastic tubes of 1 0/5 4,0-12, /9 4,0-12, ,0-20, ,0-30, ,0-38, ,0-26, ,0-39, ,0-32, ,0-28, ,0-30, ,0-37, ,8-10, ,0-25, ,0-32, * 6,0-40, ,0 6,0 8,0 10,0 12,0 No. 0/5 No. 0/9 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 No. 1 No. 2 6,0 9,0 13,0 16,0 19,0 21,0 23,0 26,0 29,0 32,0 35,0 38,0 No. 3 No. 4 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 PG 6,0 9,0 11,4 7 14,0 9 17, ,0 13,5 21, ,75 21 Step drills HSS-TiN, CBN ground, spiral fluted Point cut: work s specification DIN 1412 C Point- / Step angle: 118 / 90 Surface: titanium-nitride coated in plastic tubes of 1 0/9 4,0-12, E 1 4,0-20, E 2 4,0-30, E 9 6,0-37, E 4,0 6,0 9,0 12,0 15,0 18,0 21,0 24,0 27,0 30,0 33,0 36,0 39,0 No. 5 No. 6 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 R 6,0 9,0 11,2 1/8 14,5 1/4 18,2 3/8 22,3 1/2 27,9 3/4 32,0 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 0/9 4,0-12, T 1 4,0-20, T 2 4,0-30, T 9 6,0-37, T * straight fluted No. 1 No

Step drills HSS, CBN ground, spiral fluted DIN 1412 C Point angel: 118 Ø-Tolerance: work s specification Right-hand cutting in plastic tubes of 1 Step height 2. Ideal to produce switchboards.

0/9k 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 Step drills HSS, CBN ground, spiral fluted for metric cable connections, through holes

4 Step drills HSS, CBN ground, spiral fluted DIN 1412 C Point angel: 118 Ø-Tolerance: work s specification Right-hand cutting in plastic tubes of 1 Step height 2. Ideal to produce switchboards. 0/9k 4,0-12, k 4,0-20, k 4,0-30, No. 1k 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 No. 0/9k 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 Step drills HSS, CBN ground, spiral fluted for metric cable connections, through holes after DIN/EN DIN 1412 C Point angel: 118 Ø-Tolerance: work s specification Right-hand cutting in plastic tubes of 1 Step height ,5-32, ,5-40, No. 15 6,5 8,5 10,5 12,5 16,5 20,5 25,5 29,0 32,5 No. 2k 6,5 8,5 10,5 12,5 16,5 20,5 25,5 29,0 32,5 36,5 40,5 Step drills HSS, CBN ground, spiral fluted for metric cable connections, core holes after DIN/EN with split point DIN 1412 C Step angel: 90 Ø-Tolerance: work s specification Right-hand cutting in plastic tubes of 1 Step height 4. No. 14 5,3 7,0 9,0 10,5 14,5 18,5 23,5 27,0 30,5 No. 17 5,3 7,0 9,0 10,5 14,5 18,5 23,5 27,0 30,5 34,5 38,5 14 5,3-30, ,3-38, No

5 Table of application for step drills HSS, HSS Co 5, HSS-TiN, CBN ground Size Description No. 0/5 for metric hole diameters Ø 4,0 Ø 6,0 Ø 8,0 Ø 10,0 Ø 12,0 No. 0/9 for metric hole diameters Ø 4,0 Ø 5,0 Ø 6,0 Ø 7,0 Ø 8,0 Ø 9,0 Ø 10,0 Ø 11,0 Ø 12,0 No. 1 for metric hole diameters Ø 4,0 Ø 6,0 Ø 8,0 Ø 10,0 Ø 12,0 Ø 14,0 Ø 16,0 Ø 18,0 Ø 20,0 No. 2 for metric hole diameters Ø 4,0 Ø 6,0 Ø 8,0 Ø 10,0 Ø 12,0 Ø 14,0 Ø 16,0 Ø 18,0 Ø 20,0 Ø 22,0 Ø 24,0 Ø 26,0 Ø 28,0 Ø 30,0 No. 3 for metric hole diameters Ø 6,0 Ø 9,0 Ø 13,0 Ø 16,0 Ø 19,0 Ø 21,0 Ø 23,0 Ø 26,0 Ø 29,0 Ø 32,0 Ø 35,0 Ø 38,0 No. 4 for steel conduit threads (core holes) PG 7 PG 9 PG 11 PG 13,5 PG 16 PG 21 Ø 11,4 Ø 14,0 Ø 17,25 Ø 19,0 Ø 21,25 Ø 26,75 No. 5 for metric hole diameters Ø 4,0 Ø 6,0 Ø 9,0 Ø 12,0 Ø 15,0 Ø 18,0 Ø 21,0 Ø 24,0 Ø 27,0 Ø 30,0 Ø 33,0 Ø 36,0 Ø 39,0 No. 6 for pipe threads (external Ø, through holes) R 1/8" R 1/4" R 3/8" R R 3/4" Ø 11,2 Ø 14,5 Ø 18,2 Ø 22,3 Ø 27,9 No. 7 for pipe threads (core holes) G 1/8" G 1/4" G 3/8" G G 3/4" Ø 8,8 Ø 11,8 Ø 15,3 Ø 19 Ø 24,5 No. 8 for steel conduit threads (through holes) PG 7 PG 9 PG 11 PG 13,5 PG 16 PG 21 Ø 12,5 Ø 15,2 Ø 18,6 Ø 20,4 Ø 22,5 Ø 28,3 No. 9 for steel conduit threads (through holes) PG 7 PG 9 PG 11 PG 13,5 PG 16 PG 21 PG 29 Ø 12,5 Ø 15,2 Ø 18,6 Ø 20,4 Ø 22,5 Ø 28,3 Ø 37 No. 10 for blind rivets M3 - M4 - M5 - M6 - M8 Ø 4,8 Ø 6,4 Ø 7,2 Ø 9,6 Ø 10,65 No. 11 for metric hole diameters with high steps Ø 6,0 Ø 9,0 Ø 12,0 Ø 16,0 Ø 20,0 Ø 22,5 Ø 25,0 No. 12 for metric hole diameters with high steps Ø 6,0 Ø 9,0 Ø 12,0 Ø 16,0 Ø 20,0 Ø 22,5 Ø 25,0 Ø 28,5 Ø 32,0 No. 13 for metric hole diameters and large diameters Ø 6,0 Ø 11,0 Ø 17,0 Ø 23,0 Ø 29,0 Ø 30,0 Ø 31,0 Ø 32,0 Ø 33,0 Ø 34,0 Ø 35,0 Ø 36,0 Ø 37,0 Ø 38,0 Ø 39,0 Ø 40,0 No. 14 for metric cable connections, core holes after DIN/EN M 6 M8 M 10 M 12 M 16 M 20 M 25 Ø 5,3 Ø 7,0 Ø 9,0 Ø 10,5 Ø 14,5 Ø 18,5 Ø 23,5 M 32 Ø 30,5 No. 15 for metric cable connections, through holes after DIN/EN M 6 M 8 M 10 M 12 M 16 M 20 M 25 Ø 6,5 Ø 8,5 Ø 10,5 Ø 12,5 Ø 16,5 Ø 20,5 Ø 25,5 M 32 Ø 32,5 No. 16 for metric cable connections, core holes after DIN/EN M 6 M8 M 10 M 12 M 16 M 20 M 25 Ø 5,3 Ø 7,0 Ø 9,0 Ø 10,5 Ø 14,5 Ø 18,5 Ø 23,5 M 32 M 40 Ø 30,5 Ø 38,5 No. 17 for metric cable connections, through holes after DIN/EN M 6 M 8 M 10 M 12 M 16 M 20 M 25 Ø 6,5 Ø 8,5 Ø 10,5 Ø 12,5 Ø 16,5 Ø 20,5 Ø 25,5 M 32 M 40 Ø 32,5 Ø 40,5 No. 8 No. 10 No. 12 PG 6,0 9,0 12,5 7 15,2 9 18, ,4 13,5 22, , ,5 4,8 6,4 7,2 9,6 10,65 6,0 9,0 12,0 16,0 20,0 22,5 25,0 28,5 32,0 No. 7 No. 9 No. 11 No. 13 5,0 G 8,8 1/8 11,8 1/4 15,3 3/8 19,0 1/2 24,5 3/4 28,0 PG 6,0 9,0 12,5 7 15,2 9 18, ,4 13,5 22, ,0 28, ,5 34,0 37,0 29 6,0 9,0 12,0 16,0 20,0 22,5 25,0 6,0 11,0 17,0 23,0 29,0 30,0 31,0 32,0 33,0 34,0 35,0 36,0 37,0 38,0 39,0 40,0-59 -

Step drills bit HSS, CBN ground, spiral fluted DIN 1412 C Shank: 6,35 x 27 in plastic tubes of 1 Shank hexagon 0/9 4,0-12,0 72 9 1/ 4" 101 050-9H 1 4,0-20,0 81 9 1/4" 101 051 H 2 4,0-30,0 105 14 1/

6 Step drills bit HSS, CBN ground, spiral fluted DIN 1412 C Shank: 6,35 x 27 in plastic tubes of 1 Shank hexagon 0/9 4,0-12, / 4" H 1 4,0-20, /4" H 2 4,0-30, / 4" H Emphasised articles are new additions. No. 0/9 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 No. 1 4,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 No. 2 3/16" 1/4" Step drills HSS, size, CBN ground, 5/16" 3/8" 7/16" DIN 1412 C in plastic tubes of 1 The CBN ground flutes guarantee quiet running and high cutting performance. The cone makes it easier to withdraw the tool from the material. Shank Ø No. 2 1/8" 5/32" 3/16" 7/32" 1/4" 9/32" 5/16" 11/32" 3/8" 13/32" 7/16" 15/32" No. 1 1/4" 5/16" 3/8" 7/16" 9/16" 5/8" 3/4" 1 1/16" 1 3/ 16-1/ 2 3 1/ 8 6 1/ / 8-1 / / / /4-3 /4 2 3 /4 9 3/ / 16-7/ 8 3 1/ / / / 4 9 3/ /8-1 3 /8 3 1 /4 5 3/ / 8-1/ 2 1 7/ 8 2 1/ / / / /8-1 1 /8 3 7 /64 2 3/ /16" 1/4" 5/16" 3/8" 7/16" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" No. 3 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" 15/6" 1" No. 4 No

Step drills HSS-TiN, size, CBN ground, DIN 1412 C Surface: titanium-nitride coated The CBN ground flutes guarantee quiet running and high cutting performance.

7 Shank Ø 1 3/16-1 /2 3 1 /8 6 1/4 101 701 T 2 1/ 8-1 / 2 3 1 / 8 13 1/ 4 101 702 T 3 1/ 4-3/ 4 2 3/ 4 9 3/ 8 101 703 T 4 3/ 16-7/ 8 3 1/ 4 12 3/ 8 101 704 T 5 1/2-1 3 1 /4 9 3/8 101 705 T 6 7/8-1 3

9 7/8" 1 1/8" Step drill set HSS, CBN ground, spiral fluted in steel case Description Price / set Step drills HSS spiral fluted, sizes 0/9, 1, 2 101 026 No.

7 Step drills HSS-TiN, size, CBN ground, DIN 1412 C Surface: titanium-nitride coated The CBN ground flutes guarantee quiet running and high cutting performance. The cone makes it easier to withdraw the tool from the material. 7/8" 1 1/8" 1 7/32" 1 1/4" 1 3/8" 3/8" in plastic tubes of 1 No. 6 No. 7 Shank Ø 1 3/16-1 /2 3 1 /8 6 1/ T 2 1/ 8-1 / / / T 3 1/ 4-3/ 4 2 3/ 4 9 3/ T 4 3/ 16-7/ 8 3 1/ / T 5 1/ /4 9 3/ T 6 7/8-1 3 /8 3 1 /4 5 3/ T 7 3/8-1 /2 1 7 /8 2 1/ T 8 7/ / / T 9 7/ 8-1 1/ 8 3 7/ / T 7/8" No. 8 No. 9 7/8" 1 1/8" Step drill set HSS, CBN ground, spiral fluted in steel case Description Price / set Step drills HSS spiral fluted, sizes 0/9, 1, No E Step drill set HSS Co 5, CBN ground, spiral fluted in steel case Description Price / set Step drills HSS Co 5 spiral fluted, sizes 0/9, 1, E Step drill set HSS-TiN, CBN ground, spiral fluted in steel case No T Description Price / set Step drills HSS-TiN spiral fluted, sizes 0/9, 1, T Step drill set Combi HSS, CBN ground, spiral fluted in steel case Description Price / set No Step drills HSS spiral fluted, sizes 1, milling drill HSS Ø 6,0 x

Step drills HSS, CBN ground with 3 cutting edges The deep-ground flutes of step drills with 3 cutting edges guarantee absolutely chatterfree working.

8 Step drills HSS, CBN ground with 3 cutting edges The deep-ground flutes of step drills with 3 cutting edges guarantee absolutely chatterfree working. The reduced load of the cutting edges allows a higher feed rate especially for soft materials like non-ferrous metals. The cone makes it easier to withdraw the tool from the material. 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 4,0 6,0 8,0 10,0 12,0 14,0 in plastic boxes of 1 No. 0/9 16,0 18,0 20,0 0/9 4,0-12, ,0-20, ,0-30, ,0 6,0 8,0 10,0 12,0 14,0 16,0 18,0 20,0 22,0 24,0 26,0 28,0 30,0 No. 1 No. 2 Step drill set HSS, CBN ground with 3 cutting edges in steel case Description Price / set Step drills HSS with 3 cutting edges, sizes 0/9, 1, No Milling drills HSS, HSS-TiN Point cut: helical point / TiN in plastic boxes of 1 For drilling and milling contours into wood, sheet metal, plastics and other thin-walled materials. Twist drill at the front, turning into a milling cutter with chip breakers. No Ø Material 6,0 90 HSS ,0 90 HSS ,0 90 HSS-TiN T 8,0 90 HSS-TiN T No T

Step drills HSS, CBN ground Point cut: without point The CBN ground flutes guarantee quiet running and high cutting performance. The cone makes it easier to withdraw the tool from the material.

9 Step drills HSS, CBN ground Point cut: without point The CBN ground flutes guarantee quiet running and high cutting performance. The cone makes it easier to withdraw the tool from the material. 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0 20,0 in plastic boxes of 1 NEW No ,0 21,0 22,0 23,0 24,0 25,0 26,0 27,0 28,0 29,0 30, ,0-20, ,0-30, ,0-40, ,0 31,0 32,0 33,0 34,0 35,0 36,0 37,0 38,0 39,0 40,0 No. 30 Step drills - table of cutting speeds No. 40 Material High carbon High carbon Alloyed Cast iron Cast iron CuZn- CuZn- Al- Thermo- Durostruc. steel struc. steel steel alloy alloy alloy plastics plastics up to 700 over 700 up to 1000 up to 250 over 250 brittle tough up to 11% Si N/² N/² N/² N/² N/² Sheet thickness up to 4 up to 4 up to 4 up to 4 up to 4 up to 4 up to 4 up to 4 up to 4 up to 4 Vc = m/min Cooling lubricant Cutting Cutting Cutting Air Air Air Air Cutting Water Air spray spray spray spray Size r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. No. 0/5 4,0-12, No. 0/9 4,0-12, No. 1 4,0-20, No. 2 4,0-30, No. 3 6,0-38, No. 4 6,0-26, No. 5 4,0-32, No. 6 6,0-32, No. 7 5,0-28, No. 8 6,0-30, No. 9 6,0-37, No. 10 4,8-10, No. 11 6,0-25, No. 12 6,0-32, No. 13 6,0-40, No. 14 5,3-30, No. 15 6,5-32, No. 16 5,3-38, No. 17 6,5-40, No ,0-20, No ,0-30, No ,0-40, Size r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. r.p.m. No. 1 3/16-1 / No. 2 1/ 8-1/ No. 3 1/ 4-3 / No. 4 3/16-7 / No. 5 1/ No. 6 1/ / No. 7 5/32-1 / No. 8 5/ 32-7/ No. 9 5/ /

10 For your notes

Step drills And, with higher dimensional precision the drills will last considerably longer while maintaining the precise process tolerances.

Step drills And, with higher dimensional precision the drills will last considerably longer while maintaining the precise process tolerances. » STEP DRILLS Step drills The flutes of RUKO high performance step drills are CBN ground from the solid hardened form. Because CBN (cubical boron nitride) is a much harder abrasive than even silicium carbide