SM-121A (HANDHOLE SEAT GRINDER)
Contents
1. SM 121A GUIDELINES The Wilson Pneumatic Handhole Seat Grinder will restore to a smooth flat surface the gasket seat of any size or shape of handhole Corroded pitted dented scratched fluid abraded seats can be returned to perfect sealing condition with this tool The Wilson grinder is a precision tool ruggedly built for long usefulness un der rough working conditions The grinder assembly is mounted by attachment to the handhole plate stud of a nearby handhole Then the assembly is leveled by adjusting the leveling screws with the motor assembly attached so that the grinding wheel is in the handhole The motor is positioned up or down as required for the grinding wheel to take the de sired cut from the existing seat Then the motor is turned on and moved about the hole while the guide roller bears against the side of the handhole and the new seat is ground Removal of one screw permits taking the motor and wheel out of the handhole for examination of the seat An accessory inspection mirror is furnished to facilitate this The wheel can then be replaced in the hole without disturbing the setting The rugged bracket which supports the powerful grinder motor moves in dovetail ways to insure precise alignment and is clamped to prevent any deviation from the height setting made by turning the adjusting handle Alternate mounting locations are provided for attaching the motor clamp to the dovetail slide when the handhole is in a header2. SM 121A ACCESSORIES This can be useful for extra long reach or to avoid obstructions The nut at one i w Y end is to be screwed onto a handhole plate stud The grinder mounting as EXTENSION BAR CAT NO 1041 0075 sembly is then attached to the bar screw which may be placed in any of the four 3 3 8 spaced holes 13 1 2 max A screw within the bar screw provides support for added rigidity EXTENSION LINK 1041 0065 For extra large handhole an additional extension link attached will accommodate for the increased contour to be ground Simply attach extension link between link key7 and dovetail body key 22 For a flawless re assembly leave link pins key 5 in their prior loca tion INDICTOR CLAMP 1041 0087 Additional convenience can be secured by using a separate Indicator Clamp Assembly so that the motor does not have to be moved in and out of the motor clamp ALIGNMENT INDICATOR 1043 This device greatly facilitates set up It is mounted in place of the motor The serrations shown are on a blade which is brought into contact with the wall of the hand hole A pointer attached to the blade indicates the align ment of the mounting with respect to the hole If the equipment is leveled to align with the hole wall the sub sequent grinding cut will be square with the hole SM 121A MAINTENANCE Rotor Blades Replace if broken or worn 1 16 below slot top Rotor Spindle A dropped
3. 28 9 16 14 3 1 5 8 1041 0025 19 32 15 1 1 9 16 1041 0026 2 3 4 1041 0083 1041 1083 5 8 15 9 1 1 2 1041 0027 21 32 16 7 1 7 16 1041 0028 Caution Be sure that the wheel being used with the grinder complies with the requirements established in the American Standard Safety Code for The use Care and Protection of Abrasive Wheels A S A B7 1 1964 11 SM 121A SPECIFICATIONS Model no 1041 1601 Free Speed RPM 12000 Air Pressure psi 90 Air Inlet 1 4 NPT Hose 3 8 LD Minimum Air Flow Free Speed 22 CFM Spindle 3 8 24 UNF 2 Thomas C Wilson Inc 21 11 44th Avenue Long Island City New York 11101 Tel 718 729 3360 Fax 718 361 2872 http www tcwilson com E mail tcwilson tcwilson com
4. NDHOLE SEAT GRINDER ASS Y 1 1041 1600 MOTOR ASSEMBLY WITH CLAMP 1 1041 0088 MOUNTING ASSEMBLY 1 1041 3067 HOSE WHIP 8 LONG 3 8 I D 1 50371 0000 EXTENSION ARM ASSEMBLY 1 104 1 0093 CUP BRUSH 2 DIA 1 8340 0000 GRINDING WHEEL 2 COARSE GRIT 1 1041 0029 GRINDING WHEEL 2 FINE GRIT 1 1041 1029 GUIDE ROLLER 1 5 8 DIA 1 1041 0025 GUIDE ROLLER 1 9 16 DIA 1 1041 0026 GUIDE ROLLER 1 1 2 DIA 1 1041 0027 GUIDE ROLLER 1 7 16 DIA 1 1041 0028 NP ADAPTER 1 8M X 7 8 9F 1 1041 0035 NP ADAPTER 1 8M X 3 4 1OF 1 1041 0036 5 16 HEX KEY 1 52147 0000 3 16 HEX KEY 1 51254 0000 5 64 HEX KEY 1 52142 0000 WRENCH 9 16 X 7 16 1 1041 0072 WHEEL DRESSING STONE 1 1041 0066 INSPECTION MIRROR 1 1041 0030 FILTER LUBRICATOR ASSEMBLY 1 8596 0000 AIR LINE FILTER 1 8911 0000 HEX NIPPLE BRASS 1 9360 0000 AIR LINE LUBRICATOR 1 3611 0000 SM 121A PARTS LIST SM 121 A EQUIPMENT SHOWN AND HANDHOLE PLATE HEADER PLATE 7 SECTION A A SM 121A 2272222212 1122 TSS DE SE nn Pass X MESSE en es GUIDE VIEW B B GRINDING WHEEL OO G G OOO SM 121A PARTS LIST Key Description Part No Key Description Part No Handhole Seat Grinder 1041 1600 Motor amp Clamp Assembly 1041 0088 Mounting Assembly 1041 3067 Motor
5. SM 121A 1041 1601 Smarter Tools for Smarter Work HANDHOLE SEAT GRINDER OPERATING INSTRUCTIONS amp SERVICE MANUAL Rev A 9 17 2007 TO REDUCE THE RISK OF INJURY AND EQUIPMENT DAMAGE USER MUST READ AND UNDERSTAND OPERATOR S MANUAL Thomas C Wilson Inc 21 11 44th Avenue Long Island City New York 11101 Tel 718 729 3360 Fax 718 361 2872 http www tcwilson com E mail tcwilson tcwilson com SM 121A SAFETY INSTRUCTIONS AN WARNING READ AND UNDERSTAND ALL INSTRUCTIONS Failure to follow all instructions listed below may result in accident fire and or personal injury SAVE THESE INSTRUCTIONS Do not allow corrosive gases or foreign material to enter the unit Moisture oil based contaminants or other liquids must be filtered out Eye protection is always required when running motor Hearing protection is recommended when in close proximity to all operating air motors Dust mask non skid safety shoes hard hat gloves and other personal safety equip ment must be used Stay alert watch what you are doing and use common sense when operating a power tool Dress properly Do not wear loose clothing or jewelry Keep your work area clean and well lit Do not operate power tools in explosive atmospheres such as in the presence of flammable liquids gases or dust Disconnect the tool from the air supply before installing making any adjustment changing accessories servicing or storing tool
6. amp Throttle Housing 1041 1900 1 Leveling Plate 1041 0003 27 Hex Nut 50455 2 Mounting Nut 1041 0002 28 Front Flange 50807 3 Cap Screw 1041 0063 29 Rear Flange 1041 0022 4 Leveling Bracket 1041 0004 30 Retainer 1041 0021 5 Link Pin 4 1041 0006 31 Ball Bearing 24525 6 _ Roll Pin 4 28056 32 Motor Housing 1041 0020 7 Link 1041 0005 33 Spindle 4 slots 1041 0023 8 Slide Assembly 1041 3059 34 Front Bearing Nut 50812 9 Handle 1041 3051 35 Ball Bearing 50827 10 Roll Pin 28062 36 Front Spacer 50810 11 Set screw 40015 37 Front Plate 50809 12 Micrometer Dial 1041 3052 38 Cylinder 50816 13 Washer 1041 0055 39 Rotor Blades set of 4 50817 0004 Index Plate Assembly 1041 3049 40 Pin 52496 14 Index Plate 1041 3149 41 Rear Plate 52978 0014 15 Bearing Sleeve 1041 3057 42 Ball Bearing 24520 16 Washer 1041 3102 43 Nameplate 52152 17 Lead Screw 1041 3150 44 Rear Plate Plug 53071 18 Button Head Screw 2 1041 3039 Throttle Assembly 1041 0069 19 Hex Nut 2 1041 3141 45 Push Button ON 50895 20 Front Flange 2 1041 3041 46 O Ring 7830 21 Rear Flange 2 1041 3241 47 Push Button OFF 50893 22 Dovetail Body 1041 3038 48 Throttle Housing 1041 0096 23 Slide Bracket 1041 3046 49 Bushing with Screen 53629 24 Gib 1041 3040 Motor Clamp Assembly 1041 0087 25 Washer 30574 50 Motor Clamp 1041 0086 26 Cap Screw 24004 51 Cap Screw 1006 0010 52 Gasket 1041 0060
7. mounting grinding wheel 2 Mount grinder on plate stud of one handhole while grinding the seat of another The long Mounting Nut Key 2 has a 1 8 thread For a handhole stud with a 7 8 9 thread use Adapter No 1041 0035 For a 3 4 10 thread use No 1041 0036 OPERATION RECOMMENDED OPERATING AIR PRESSURE 90 PSI 1 To avoid damage to the grinding wheel temporarily remove Motor Assembly No 1041 0088 from Slide Assembly Key 8 Unscrew Cap Screw Key 26 with washer 2 Attach mounting assembly No 1041 3067 to the handhole plate stud with Mounting Nut key 2 in the general direction of the seat to be ground 3 Place motor assembly in the handhole and bolt its clamp with cap screw and washer to Slide Bracket key 23 4 Position grinding wheel by turning Handle key 9 Lock assembly against move ment Alternately set the 4 Leveling Screws key3 and the slide height to position the grinding wheel squarely to the existing handhole seat 5 Fora light cut turn on motor and adjust slide handle Move motor until guide roller touches handhole side Then with the roller in contact with hole wall move the motor around hole Graduations on micrometer thimble are in thousands of an inch 6 Avoid a rapid breakdown of the grinding wheel face by taking a series of light cuts 7 Unbolt motor to examine seat surface with inspection mirror No 1041 0030 SM 121A KIT LIST DESCRIPTION OTY CAT NO TOOL BOX 1 24939 0000 HA
8. of 1 1 2 to 2 1 2 thickness The grinder can reach 12 5 8 inches from the mounting stud to the far side of the handhole with a 2 dia wheel attached If a greater reach is needed an accessory 5 long extension can be inserted between the motor clamp and slide bracket Still greater reaches can be accommodated by the use of an extension mounting bar Various seat widths can be ground by selecting the proper combinations of guide rollers and wheel diameters For extra large handholes an additional extension link attached will accommodate for the increased contour to be ground A cup brush may substitute for the grinding wheel if grinding is not needed and cleaning of the seat will suffice The motor can be used for free hand wire brushing by unbolting the clamp from the slide Wear eye protection SM 121A HOSES Attach hose whip supplied with Filter Lubricator No 8596 to air motor LUBRICATION Air motors are lubricated with oil laden operating air Use S A E No 10 oil or Wilsolube Pneumatic Motor Oil No 9047 in the Wilson Filter Lubricator No 8596 Check that a fine mist of oil is always present in exhaust air Keep hinges dovetail guide roller and screw threads coated with light oil EQUIPMENT SELECTION 1 Measure handhole seat width Select and attach guide roller to motor See chart on last page Note that Roller Retainer Key 30 has a left hand thread Be sure both blotters are between Flanges Key 28 amp 29 when
9. tool may have a bent spindle Check for straightness and replace if neces sary Cylinder and Rear End Plate Replace if surface is gouged or pitted from rust or moisture Ball Bearing Clean dirty ball bearings in kerosene and flush with clean light oil SAE10 All ball bearings should turn smoothly and freely with no noticeable looseness Air Screen Clean air screen in Bushing key 49 by reverse flushing Caution Rust Before storing tool put a good amount of oil into motor Disassembly 1 Unscrew Motor Housing key 32 from Throttle Housing key 48 Push out Rotor Assembly key 33 to 44 3 Pull Rear Plate Assembly key40 to 44 off rotor freeing cylinder and blades Disassemble above only for parts replacement Reassembly Follow above steps in reverse 10 SM 121A SELECTION CHART FOR GUIDE ROLLER AND WHEEL Grinding Wheel Seat Width Guide Roll Coarse Grit Fine Grit Dia in Inch MM Cat No Cat No Dia in Cat No 3 16 4 8 1 5 8 1041 0025 7 32 5 6 1 9 16 1041 0026 2 1041 0029 1041 1029 1 4 6 4 1 1 2 1041 0027 9 32 7 1 1 7 16 1041 0028 5 16 7 9 1 5 8 1041 0025 11 32 8 7 1 9 16 1041 0026 2 1 4 1041 0081 1041 1081 3 8 9 5 1 1 2 1041 0027 13 32 10 3 1 7 16 1041 0028 7 16 11 1 1 5 8 1041 0025 15 32 11 9 1 9 16 1041 0026 2 1 2 1041 0082 1041 1082 1 2 12 7 1 1 2 1041 0027 17 32 13 5 1 7 16 1041 00
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