3M 20238 Product Configuration / Specifications, Operating / Maintenance Instructions, Collet

Parts Page

PARTS LIST FOR PN 28331 & 28346, Extended 18,000 RPM DIE GRINDERS

Fig.	3M PN	Description	Fig.	3M PN	Description
1	06572	Collet Nut	16	06630	Rear End Plate
2	06575	Collet (1/4 in)	17	06612	Ball Bearing
2	06573	Collet (1/8 in)	18	06625	Housing
2	06574	Collet (3/16 in)	19	30400	O-Ring
2	06545	Collet (3/8 in)	20	06626	Trigger Valve Stem
2	06576	Collet (3mm)	21	06616	Pin
2	06577	Collet (6mm)	22	06614	Compression Spring
2	06546	Collet (8mm)	23	06620	O-Ring
3	30371	Collet Body	24	06627	Air Regulator
4	06611	Ball Bearing (3)	25	06613	Compression Spring
5	30420	Clamp Nut	26	06622	Steel Ball
6	30421	Extension Shaft	27	06599	Housing Cover, .5 HP
7	30423	Pilot (.75 ID)	28	06635	Paddle Assembly
8	30392	Spring Washer (2)	29	06617	Roll Pin
9	06629	Front End Plate	30	06632	Muffler Material
10	06621	O-Ring	31	06615	Disc Spring
11	30418	Front End Plate Spacer	32	06628	Exhaust Deflector
12	30422	Rotor	33	06618	Inlet Bushing
13	06647	Vane, Set of 4	34	06569	9/16 in x 3/4 in Wrench (2)
14	06631	Cylinder Liner
15	30373	Motor Restricting Washer

Product Configuration / Specifications

					Product Net		Height		Length mm		*Noise Lever		**Vibration			**Uncertainty
	Model Number	Collet	Speed RPM		Wt kg						dBA Pressure		Level m/s2
							mm (in)		(in)							K m/s2
					(lb)						(Power)		(ft/s2)
	20237	1/4 in	20,000		0.77 (1.69)		76.2 (3)		196 (7.5)		83.5 (95.1)		< 2.5	(< 8.2)		NA
25126		6 mm		0.77 (1.69)		76.2 (3)		196 (7.5)		83.5 (95.1)		< 2.5		(< 8.2)		NA
	20238	1/4 in	18,000		0.77 (1.69)		76.2 (3)		196 (7.5)		83.5 (95.1)		< 2.5	(< 8.2)		NA
25127		6 mm		0.77 (1.69)		76.2 (3)		196 (7.5)		83.5 (95.1)		< 2.5		(< 8.2)		NA
	20239	1/4 in	12,000		0.93 (2.06)		81.2 (3.2)		254 (10)		83.5 (95.1)		3.62	(11.9)		1.81
25128		6 mm		0.93 (2.06)		81.2 (3.2)		254 (10)		83.5 (95.1)		3.62		(11.9)	1.81
	20240	1/4 in	8,000		0.93 (2.06)		81.2 (3.2)		254 (10)		83.5 (95.1)		3.62	(11.9)		1.81
25129		6 mm		0.93 (2.06)		76.2 (3.2)		254 (10)		83.5 (95.1)		3.62		(11.9)	1.81
	28332	1/4 in	4,000		0.717 (1.58)		69.9 (2.75)		200 (8.875)		87.0 (98.6)		5.52			0.732
28347		6 mm		0.717 (1.58)		69.9 (2.75)		200 (8.875)		87.0 (98.6)		5.52			0.732
	28330	1/4 in	18,000		0.512 (1.13)		69.9 (2.75)		174.6 (6.875)		87.0 (98.6)		1.91			NA
28345		6 mm		0.512 (1.13)		69.9 (2.75)		174.6 (6.875)		83.5 (95.1)		1.91				NA
	28331	1/4 in	18,000		0.697 (1.54)		69.9 (2.75)	269.9 (10.625)			87.0 (98.6)		2.53			0.295
28346		6 mm		0.697 (1.54)		69.9 (2.75)		269.9 (10.625)		87.0 (98.6)		2.53			0.295

* Declared noise levels; measurements carried out in accordance with standard EN ISO 15744:2002.

** Declared vibration levels in accordance with EN12096; measurements carried out in accordance with standard EN ISO 8662-13:1997.

IMPORTANT NOTE: The noise and vibration values stated in the table are from laboratory testing in conformity with stated codes and standards and are not sufficient risk evaluation for all exposure scenarios. The actual exposure values and amount of risk or harm experienced to an individual is unique to each situation and depends upon the surrounding environment, the way in which the individual works, the particular material being worked, work station design, as well as upon the exposure time and the physical condition of the user. 3M cannot be held responsible for the consequences of using declared values instead of actual exposure values for any individual risk assessment.

Operating / Maintenance Instructions

PRIOR TO THE OPERATION

The tool is intended to be operated as a hand held tool. It is always recommended that while using the tool, operators stand on a solid floor, in a secure position with a firm grip and footing. Be aware that the sander can develop a torque reaction. See the section inSAFETY PRECAUTIONS in.

Use a clean lubricated air supply that will give a measured air pressure at the tool of 6.2 bar (90 psig) when the tool is running with the lever fully depressed. It is recommended to use an approved 10 mm (3/8 in) x 8 m (25 ft) maximum length airline. Connect the tool to the air supply as shown in Figure 1. Do not connect the tool to the airline system without an easily accessible air shut off valve. It is strongly recommended that an air filter, regulator and lubricator (FRL) be used as shown in Figure 1 as this will supply clean, lubricated air at the correct pressure to the tool. In any case appropriate air pressure regulators shall be used at all times while operating this tool where the supply pressure exceeds the marked maximum of the tool. Details of such equipment can be obtained for your tool distributor. If such equipment is not used, the tool should be manually lubricated. To manually lubricate the tool, disconnect the airline and put 2 to 3 drops of suitable pneumatic motor lubricating oil such as 3M™ Air Tool Lubricant PN 20451, Fuji Kosan FK-20 or Mobil ALMO 525 into the hose end (inlet) of the tool. Reconnect tool to the air supply and run tool slowly for a few seconds to allow air to circulate the oil. If the tool is used frequently, lubricate it on a daily basis or lubricate it if the tool starts to slow or lose power. It is recommended that the air pressure at the tool be 6.2 bar (90 psig) while the tool is running so the maximum RPM is not exceeded. The tool can be run at lower pressures but should never be run higher than 6.2 bar (90 psig). If run at lower pressure the performance of the tool is reduced.

	Recommended Airline	Recommended Maximum Hose Length		Air Pressure
	Size - Minimum			Maximum Working Pressure	6.2 bar	90 psig
10 mm	3/8 in	8 meters	25 feet	Recommended Minimum	N/A	N/A

7 8