SELF-FEED DRILL UNITS MK III BROOMATIC SALES/ENGINEERING FEATURES The Building Blocks of Low Cost Drilling and Tapping Automation
Table of Contents PAGE 1 FIG. 1 PNEUMATIC MK III WITH STANDARD 3/8 CAPACITY DRILL CHUCK. PAGE 2 FIG. 2 ELECTRIC MK III WITH TYPE 6 MULTI-SPINDLE DRILLING HEAD. PAGE 3 FIG. 3 OPTIONAL EQUIPMENT THAT CAN BE FITTED TO THE MK III. PAGE 4 FIG. 4 RANGE OF MOUNTING CLAMPS THAT ARE OFFERED. FIG. 5 SWARF EXCLUSION KIT FITTED TO THE MK III. PAGE 5 FIG. 6 METHOD OF ATTACHING THE HYDRAULIC FEED CONTROL. FIG. 7 METHOD FOR ADJUSTING THE HYDRAULIC FEED CONTROL. PAGE 6 FIG. 8 CONTROL HEAD SHOWING SEPARATE INLET PORTS FOR AIR SUPPLY. FIG. 9 CONTROL HEAD ADAPTED FOR SINGLE AIR CONNECTION. PAGE 7 FIG. 10 CONTROL HEAD SHOWING NON-RETURN VALVES FITTED. FIG. 11 CONTROL HEAD SHOWING PORT ADAPTERS FITTED IN DWELL PORTS. PAGE 8 FIG. 12 CONTROL HEAD SHOWING METHOD OF ADJUSTING FORWARD FEED RATE. FIG. 13 CONTROL HEAD SHOWING METHOD OF ADJUSTING RETURN FEED RATE. PAGE 9 FIG. 14 CONTROL HEAD WITH SPOOL VALVE PARTIALLY REMOVED. FIG. 15 CONTROL HEAD WITH SPOOL VALVE AND BRASS BUSH REMOVED. PAGE 10 FIG. 16 CONTROL HEAD WITH THE TWO NEEDLE VALVE CARTRIDGES REMOVED. FIG. 17 QUILL PULLED FORWARD TO SHOW THE METHOD OF CHANGING THE SPEEDS. PAGE 11 FIG. 18 FEED STROKE ADJUSTMENT SCREW POSITIONED ABOVE AUTO RETURN VALVE. FIG. 19 BUILT IN SOFT START FEATURE INCORPORATES FOUR ROWS OF HOLES. PAGE 12 FIG. 20 STRIP DOWN OF THE PNEUMATIC MKIII INTO SUB- ASSEMBLIES. PAGE 13 FIG. 21 SELECTING AVERAGE DRILLING FEEDS AND SPEEDS CHART
FIG. 1 Pneumatic MK III with standard 3/8" capacity drill chuck and optional foot mounting bracket. 1
FIG. 2 Electric MK III with type 6 multi-spindle drilling head and optional foot mounting bracket. 2
(F) (A) Bayonet nose housing adaptor (B) Type 6 adjustable twin spindle drilling head (C) Type 9 adjustable twin spindle drilling head (D) Single spindle tapping head (E) Exhaust collector with mufflers (F) Adjustable hydraulic feed control unit (G) Screwdriver attachment (B) (C) (A) FIG. 3 Optional equipment that can be fitted to the MK III unit (E) (D) (G) 3
FIG. 4 Range of mounting clamps that are offered for use with the MK III unit FIG. 5 MK III drill unit with the swarf exclusion kit fitted. 4
FIG. 6 Method of attaching the hydraulic feed control unit onto the MK III control head. FIG. 7 Method for adjusting the hydraulic feed control rate. 5
FIG. 8 Pneumatic control head assembly showing the separate inlet ports for the feed cylinder and motor air supply. Pneumatic units are shipped with dual porting unless single air supply is specified. Electric units require only one connection for the feed cylinder. Ports are shown fitted with 1/4" NPT port adaptors. 6 FIG. 9 Pneumatic control head showing how the unit can be adapted for single air connection feeding both the feed cylinder and motor. Note seal body and filter plug.
FIG. 10 Pneumatic control head assembly showing the non-return valves (check valves) fitted in position for the remote forward and return ports. Threaded 1/8" NPT. FIG. 11 Pneumatic control head assembly showing port adapters fitted in the dwell ports so that a pneumatic timer can be used to delay the return stroke for controlled depth drilling. Threaded 1/8" NPT. 7
FIG. 12 Pneumatic control head assembly showing the method of adjusting the forward feed rate. Clockwise rotation reduces the feed rate and counter clockwise rotation increases the feed rate. 8 FIG. 13 Pneumatic control head assembly showing the method of adjusting the return feed rate. Clockwise rotation reduces the feed rate and counter clockwise rotation increases the feed rate.
FIG. 14 Pneumatic control head assembly with the spool valve partially removed from the brass bush. (Note: The spool valve is the only moving part in the control head assembly and it is mounted on O rings. FIG. 15 Pneumatic control head assembly with the spool valve and brass bush removed. (Note: The brass bush is also mounted on O rings and can be easily replaced as a spare part. To replace the bush on competitive tools requires that the expensive control head is also replaced. 9
FIG. 16 Pneumatic control head assembly with the two needle valve cartridges removed showing their component parts. (Note: If needle valve seat is damaged, only the cartridge requires replacement not the whole control head as on competitive tools. 10 FIG. 17 MK III Unit with the quill pulled forward to show the method of changing the speed of tools without stripping down the complete unit.
FIG. 18 Feed stroke adjustment screw positioned above auto return valve. Stroke range 5/16" thru 3" (8mm - 75mm). Note: The first 5/16" of stroke is used by the soft start control for the air motor. See detail below. FIG. 19 Built in soft start feature incorporates four rows of holes within the feed tube to gradually supply air to the motor over the first 5/16" of stroke. This protects rotor blades and gear boxes from sudden shock loads, extending the life of the tool. 11
FIG. 20 Strip down of the pneumatic mk III broomatic into sub-assemblies showing the simplicity of construction. 12
SELECTING AVERAGE DRILLING FEEDS AND SPEEDS Material Drill Diameter 1/16 3/32 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 1.6 2.4 3.2 4.8 6.4 7.9 9.5 11.1 12.7 14.3 15.9 17.5 19.1 20.6 Aluminum RPM FEED/IPR HP THRUST (LBS) SFM 12224.03 11 8489.04 17 6112.06 25 4075.003.17 35 3056.003. 22 45 2445.004.32 65 2037.005.44 96 1746.006.57 135 1528.007.71 180 1358.007.87 238 1222.008 1.07 238 1111.008 1.23 300 1018.010 1.42 365 940.011 1.68 440 Brass RPM FEED/IPR HP THRUST (LBS) SFM 9168.03 6 6367.03 11 4584.04 17 3056.003.09 33 2292.004.18 55 1834.005.27 80 1528.005.34 105 1309.006.46 134 1146.007.52 167 1013.008.78 917.009.94 245 834.010 1.18 290 764.011 1.28 330 5.011 1.45 380 Cast Iron/ Mild Steel RPM FEED/IPR HP THRUST (LBS) SFM 4456.04 12 2971.04 24 2139.06 39 1425.004.12 69 10.005.21 135 856.006.28 165 713.007.36 225 611.008.43 295 535 0.10.55 345 475 0.10.76 430 428.012.90 5 389.013 1.05 6 357.014 1.20 0 329.015 1.40 795 Steel Medium Carbon (2 BHN) RPM FEED/IPR HP THRUST (LBS) SFM 3667.05 19 2546.09 35 1835.13 62 1220.003.24 105 917.004.43 733.006.48 198 611.006.66 2 524.008.99 333 458.008 1.24 395 408.010 1. 4 367.011 1.85 615 334.012 2.10 765 310.013 2.25 880 290.013 2.45 10 Stainless Steel 304 Plastic / Wood RPM FEED/IPR HP THRUST (LBS) SFM RPM FEED/IPR HP THRUST (LBS) SFM 3183.03 15 6366.03 9 2122.05 29 4244.03 14 1528.08 54 3056.03 20 1018.10 105 2037.003.03 40 764.003.14 255 1528.004.05 58 611.004.23 342 1224.004.06 68 9.005.35 435 1018.005.08 89 436.005.41 540 873.006.12 112 382.006.56 6 764.007.16 142 340.007.74 774 679.008.20 1 305.007.82 900 611.009.25 176 278.008 1.0 1035 555.010.31 188 255.009 1.3 1139 9.011.37 219 235.009 1.4 1240 4.012.44 231 NOTE: Table shows average settings and is intended as a guide only. Adjust for tool life, production rate, hardness of material, and type of tool used. The cutting tool manufacturer should be able to provide guidelines for a specific application.
45 Belmont Avenue Youngstown, OH 445 USA Phone: +1-330-759-1620 Fax: +1-330-759-9906 Email: info@airmachines.com Web: www.airmachines.com