WW collets come in sizes from 0.3 mm to 8.0 mm by 0.1 mm increments or from 1/64" to 5/16" by 1/64" increments. (Click on photo to see larger image.)
Collets provide a quick, easy method of mounting cylindrical parts or bar stock in a lathe with a great deal of centering accuracy. A drawbar which passes through the headstock and threads into the back side of the collet is used to draw the collet tightly into the appropriate adapter. (See Figure 1.) The adapter causes the jaws of the collet to close down, gripping the part to be machined. Sherline Collet Adapter and drawbar (P/N 1161) holds collets with a shaft diameter of .312" to .313". Since many collets are available with shafts of .315" (8mm) diameter, Sherline now also offers an adapter for that size as well. (P/N 1156) Sherline uses the most common thread found on the various versions of WW collets, which is .275-40.
FIGURE 1--Installation of Collet into Lathe Headstock.
WW Collets differ from Milling Collets (P/N 3060) in that WW Collets have a hole completely through the collet and drawbar. This is so long material can be passed through the headstock and the appropriate portion machined. The maximum diameter material that can pass through the WW Collet is 3/16" for American size collets and 4.5mm for metric size collets. WW Collets in larger sizes are sometimes referred to as "Pot Collets". (See Figure 5.)
Collet accuracy may be improved by taking a light cut across the entrance angle of the Collet Adapter with the headstock set at 20° using a boring tool as shown in figure 2. (Refer also to the instruction manual on taper turning and boring.) In most cases, however, collets are accurate enough and do not require this truing operation.
Note also that the collets available from Sherline are accurate yet economically priced. Should extreme accuracy beyond the tolerances of these collets be required, even more accurate collets are available from other sources and cost about $40 or more each.
FIGURE 2-- Machining a precise angle on a collet adapter.
FIGURE 3-- Collet set with drawbar, adapter and knockout bar (P/N 1160, Inch-- P/N 1178, Metric).
FIGURE 4-- Deluxe Collet Set in Wooden Box (P/N 1162, Inch--P/N 1179, Metric).
FIGURE 5-- "Pot" or "Step" Collets and Dowel Pins in sizes 1-1/4" (P/N 2102), 1" (P/N 2101) and 3/4" (P/N 2100).
These collets are designed to hold larger and odd shaped pieces. The collets are split and have a 1/8" hole through. It is your job to bore them to fit your application. This is accomplished by tightening the collet in the lathe on the 1/8" pin supplied and boring the collet to the size needed. The depth of the bore shouldn't exceed .200" (5 mm). The diameter shouldn't exceed .625" (16 mm) on the 3/4", .875" (22 mm) on the 1" or 1.125" on the 1-1/4" Pot Collets.
These same three pot collet sizes are now also available with 10mm "D" shanks for use in watchmaker's lathes with that size spindle. They are numbered as follows: P/N 2103 (3/4"), P/N 2104 (1") and P/N 2105 (1-1/4").
NOTE: Pot Collets are designed to hold material only on the face end, not through the collet.
INCH WW COLLETS
|
PART NO. |
FRACTION |
DECIMAL |
| 116001 | 1/64" | .016" |
| 116002 | 1/32" | .031" |
| 116003 | 3/64" |
.047" |
|
116004 |
1/16" |
.063" |
|
116005 |
5/64" |
.078" |
|
116006 |
3/32" |
.094" |
|
116007 |
7/64" |
.109" |
|
116008* |
1/8" |
.125" |
|
116009 |
9/64" |
.141" |
|
116010 |
5/32" |
.156" |
|
116011 |
11/64" |
.172" |
|
116012* |
3/16" |
.188" |
|
116013 |
13/64" |
.203" |
|
116014 |
7/32" |
.219" |
|
116015 |
15/64" |
.234" |
|
116016* |
1/4" |
.250" |
|
116017 |
17/64" |
.266" |
|
116018 |
9/32" |
.281" |
|
116019 |
19/64" |
.297" |
|
116020* |
5/16" |
.313" |
| 2082 | Special Order | to .320" |
| 2050 | WW Blank | -- |
| 2083 | WW w/ 1" blank | -- |
* Indicates Collets included in set P/N 1160
METRIC WW COLLETS
|
PART NO. |
MM SIZE |
DECIMAL |
| 117803 | 0.3 mm | .012" |
| 117804 | .4 mm | .016" |
| 117805 | .5 mm | .020" |
| 117806 | .6 mm | .024" |
| 117807 | .7 mm | .027" |
| 117808 | .8 mm | .032" |
| 117809 | .9 mm | .035" |
| 117810 | 1.0 mm | .039" |
| 117811 | 1.1 mm | .043" |
| 117812 | 1.2 mm | .047" |
| 117813 | 1.3 mm | .051" |
| 117814 | 1.4 mm | .055" |
|
117815 |
1.5 mm |
.059" |
| 117816 | 1.6 mm | .063" |
| 117817 | 1.7 mm | .067" |
| 117818 | 1.8 mm | .071" |
| 117819 | 1.9 mm | .075" |
|
117820* |
2.0 mm |
.079" |
| 117821 | 2.1 mm | .083" |
| 117822 | 2.2 mm | .087" |
| 117823 | 2.3 mm | .091" |
| 117824 | 2.4 mm | .094" |
|
117825 |
2.5 mm |
.098" |
| 117826 | 2.6 mm | .102" |
| 117827 | 2.7 mm | .106" |
| 117828 | 2.8 mm | .110" |
| 117829 | 2.9 mm | .114" |
|
117830* |
3.0 mm |
.118" |
| 117831 | 3.1 mm | .122" |
| 117832 | 3.2 mm | .126" |
| 117833 | 3.3 mm | .130" |
| 117834 | 3.4 mm | .134" |
|
117835 |
3.5 mm |
.138" |
| 117836 | 3.6 mm | .142" |
| 117837 | 3.7 mm | .146" |
| 117838 | 3.8 mm | .150" |
| 117839 | 3.9 mm | .154" |
|
117840* |
4.0 mm |
.158" |
| 117841 | 4.1 mm | .161" |
| 117842 | 4.2 mm | .165" |
| 117843 | 4.3 mm | .169" |
| 117844 | 4.4 mm | .173" |
|
117845 |
4.5 mm |
.177" |
| 117846 | 4.6 mm | .181" |
| 117847 | 4.7 mm | .185" |
| 117848 | 4.8 mm | .189" |
| 117849 | 4.9 mm | .193" |
|
117850* |
5.0 mm |
.197" |
| 117851 | 5.1 mm | .201" |
| 117852 | 5.2 mm | .205" |
| 117853 | 5.3 mm | .209" |
| 117854 | 5.4 mm | .213" |
|
117855 |
5.5 mm |
.217" |
| 117856 | 5.6 mm | .220" |
| 117857 | 5.7 mm | .224" |
| 117858 | 5.8 mm | .228" |
| 117859 | 5.9 mm | .232" |
|
117860* |
6.0 mm |
.236" |
| 117861 | 6.1 mm | .240" |
| 117862 | 6.2 mm | .244" |
| 117863 | 6.3 mm | .248" |
| 117864 | 6.4 mm | .252" |
|
117865 |
6.5 mm |
.256" |
| 117866 | 6.6 mm | .260" |
| 117867 | 6.7 mm | .264" |
| 117868 | 6.8 mm | .268" |
| 117869 | 6.9 mm | .272" |
|
117870 |
7.0 mm |
.276" |
| 117871 | 7.1 mm | .280" |
| 117872 | 7.2 mm | .283" |
| 117873 | 7.3 mm | .287" |
| 117874 | 7.4 mm | .291" |
|
117875 |
7.5 mm |
.295" |
| 117876 | 7.6 mm | .299" |
| 117877 | 7.7 mm | .303" |
| 117878 | 7.8 mm | .307" |
| 117879 | 7.9 mm | .311" |
|
117880 |
8.0 mm |
.315" |
* Indicates Collets included in set P/N 1178
Sherline Milling Collets are designed to be used with Morse #1 internal taper that is standard on the spindle of both the Sherline lathe and mill. Because of the shallow angle of the Morse #1 taper when the drawbolt is tightened, greater clamping force can be applied when compared to the clamping pressure of WW Collets; therefore, we recommend the use of these milling collets for holding miniature size end mills, #1 and smaller center drills (1/8" shank, and assorted other small cutters. Size are available from 3/32" to 1/4" by 1/32nds or in metric sizes of 3, 4 and 6 mm.
The milling collet sets include sizes as follows: P/N 3060—1/8", 3/16" and 1/4" or P/N 3090—3mm, 4mm and 6mm
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