Universal Air Tools UT5735 User Manual

Operator Instructions Important

Includes - Foreseen Use, Work Stations, Putting Into Service, Operating, Dismantling, Assembly and Safety Rules

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited Unit 8 Lane End Industrial Park High Wycombe Bucks HP14 3BY

Tel No Fax No

(01494) 883300 (01494) 883237

Read these instructions carefully before insta lling, operating, servicing or repairing this tool. Keep these instructions in a safe accessible place.

Extended Die Grinder

Model No/Nos Serial No

UT5735

RPM

25,000

Cycles Per Min

Product Nett Weight

1.65

0.66 3/8 10 30 10

Recommended Working

Recommended Minimum Maximum

Use - Safety Glasses Use - Safety Gloves Use - Safety Boots Use - Breathing Masks Use - Ear Protectors

lbs Kg

Air Pressure

Perso n a l Sa fe t y E q ui pm en t

Foreseen Use Of The Tool

This die grinder is prima rily de signe d for u se with bonded abrasive mounted point grinding wheels. It may also be used with ste el rotary files and carbide bu rrs provided their speed rating matches the speed of the grinder. This tool should not be fitted with cutting off wheels, saw blades, drill bits, etc. If there is any doubt about the correct use of this product contact your supplier for advice. Also make sure th at the shank s ize of the a ttachment to be driven matches with the collet size fitted in the grinder and that the maximum allowed running spee d of the attachment exceeds that marked on the grinder. There are special rules governing the use of bonded abrasive mounted point grinding wheels - for details see section "Operating".

Recommended Use Of

Balancer Or Support

6.3

bar

PSI

n/a

7.0

bar bar

Yes Yes

n/a

100

PSI PSI

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

Noise Level

Sound Pressure Level 91.0 dB(A) Sound Power Level 98.0 dB(A)

Test Method

Tested in accordance with Pneurop

est code PN8NTC1 and ISO Standard 3744

Vibration Level

Test Method

ested in accordance with ISO

standard 8662/1 & 8662/13

Putting Into Service

Air Supply

Use a clean lubricated air supply that will give a measured air pressure at the tool of 90 p.s.i./6.3 bar when the tool is running with the lever/trigger fully depressed. Use recommended hose size and length. It is recommended that the tool is connected to the air supply as shown in figure 1. Do not connect the tool to the air line system without incorporating an easy to reach and operate air shut off valve. The air supply should be lubricated. It is strongly recommended that an air filter, regulator, lubricator (FRL) is used as shown in Figure 1 as this will supply clean , lubricated air at the correct pressure to the tool. Details of such equipment can be obtained from your supplier. If such equipment is not used then the tool should be lubricated by shutting off the air supply to the tool, depressurising the line by pressing the lever/trigger on the tool. Disconnect the air line and

Recommended Max.

4.53

Work Stations

The tool should only be used as a handheld hand operated tool. It is always recommended that the tool is used when standing on the solid floor. It can be used in other positions but before an y such us e, the operator mus t be in a se cure position having a firm grip and footing and be a wa re of t he extra safety precautions that must be observed when using Grinding Machines.

Hose Length

Metres / Sec²

Page No 1

pour into the intake bushing a teaspoonful (5ml) of a suitable pneumatic motor lubricating oil preferably incorporating a rust inhibitor. Reconnect tool to air supply and run tool slowly for a few sec onds to allow air to circulate the oil. If tool is used frequently lubricate on daily basis and if tool starts to slow or lose power. It is recommended that the air pressure at the tool whilst the tool is running is 90 p.s.i./6.3 bar. The tool can run at lower and higher pressures with the maximum permitted working air pressure of 100 p.s.i./7.0 bar.

Operating

Select a suitable mounted point that has a free running speed higher than the maximum running speed marked on the tool. Make sure that the diameter of the shank exactly matches the diameter of the collet mounted in the grinder. There are four standard sizes of collet available for use with this grinder, i.e.

1) - 1/4" Dia (0.250ins) (6.35mm)

2) - 6mm (0.236ins)

3) - 1/8" (0.125ins) (3.175mm)

4) - 3mm (0.118ins) Never try to force a 1/4" diameter shank into a 6mm collet or a 1/8" diameter shank into a 3mm collet. Never try to close a 1/4" diameter collet to secure a 6mm shank or a 1/8" diam eter collet to secure a 3mm diameter shank. Always match correctly the shan k s i z e t o t h e coll et s i z e. I f unce rt a i n, h av e p a rt s measured by a competent person. Push the shank as far as possible into the collet and tighten the collet nut u sing the spanners provided on the collet nut and output spindle. The shank of the mounted point may be pulled forward from the maximum insertion length but always ensure a minimum gripping length of not less than 10mm - See Figure 2. Be aware that the allowed running speed of the mounted point is lowered because of an increase in the length of the shank between the end of the collet and the body of the mounted point. This distance is shown in Diagram 2 as "LO" and is called the overhang. The information with respe ct to mount ed point size, pe rmissible runni ng speed and r educti on in r unn i ng spee d d ue to an incre as e i n o v er ha ng i s ava i l able fro m th e su p p l i e r o f th e mounted point. If the increase in overhang for access reasons takes the permissible running speed of the mounted point below the free running speed of the grinder select a smaller diameter mounted point. The fitting of the mounted point should be done by a trained operator. When first starting th e grinder w ith a ne w whee l fitted, the grinder should not be near othe r persons and be held in a protected area, i.e. under a bench and run for a few seconds. This will protect personnel from possible effects of damage to the mounted point before it was fitted to the grinder i.e. wheel breakage. Always use eye protection and wear protective gloves if there are sharp edges in the work area. The tool and the grinding process can create a noise level such that the use of ear protectors is advised. If the grinding process creates a dust then use a suitable breathing mask. Check that the material being worked will not cause harmful dust or fumes. If this is so then special breathing masks may be required.

Figure 2. Gripping length of collet and chuck

Page No 2

If the grinder vibrates when first fitting a mounted point or during operation, re move from service immediately and corre ct fault before continuing to use. Do not apply excessive pressure as this will reduce the cutting efficiency and can bend the shank of the mounted point causing vibration an d the possibility of breakage. Apply light loads to allow the wheel to cut. Handle the grinder with care. If the grinder is dropped, carefully check the mounted point for damage, i.e. cracks, chipping and start for the first time a s for fitting a new wheel i.e. un der a bench. Never exceed the maximum air pressure. If there is this possibility always use this grinder with a pressure reducing valve fitted in the s upply line. Your supplier will advise of suitable equipment. This grinder is fitted with a speed regulator and the speed may be reduced by rotating air regulator (41) . When making speed checks always rotate the air regulator to the position to give the highest maximum speed.

Dismantling & Assembly Instructions

Disconnect from air supply. Remove collet nut (25) and collet (24). Unscrew coupling nut (14) and remove extended front end assembly complete. To dismantle extended front end assembly, coupling nut (26) may be un sc re we d from ex te ns ion h ousing (23) [left ha nd thread]. Pull out motor assembly.

Grip the motor assembly by hand or in a soft jaw vice and tap the rear end of the rotor (15) through the rear end plate (14) and bearing (13). Tap rear end bearing (13) out of rear end plate (14). Remove

D = diameter of mounted point T = length of mounted point Lo = overhang S = diameter of shank Lg = gri pping length

4 off rotor bl ades (16) and remove cylinder (18). Pins (17) may be removed

from cylinder (18). Th e rotor (18) can then be tapped through front end bearing (20), front end plate (19) and spacer (12). Front end bearing (20) can be tapped out of front end plate (19). Clean an d e xam i n e p a r t s f or we ar and r e p l ac e only with manufacturer supplied parts. Ensure that the faces of end plates (14) and (19) that abut cylinder (18) are flat and free from burrs. Lap on a flat, very fine grade of abrasive paper if necessary. Check O-Rings for cuts and wear.

Reassembly

Lightly c oat parts with oil, pa ck bea rin gs w ith a lithium or molybdenum based general purpose grease and reassemble in the reverse order. Note:- when reassembling the motor assembly, ensure that pins (17) in cylinder (18) are correctly located in the holes in front end plate (19) and rear end plate (14). Also ensure that pin (17) located in the outside diameter of front end plate (19) locates in the slot in motor housing (33). Check the collet assembly, the function of the safety lever and that the free speed is correct before returning to service. Ensure that the air regulator is in the maximum open position before making a speed check.

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