Framo - Worm gear sets (Framo-Norm) - Framo Morat
Framo - Worm gear sets (Framo-Norm) - Framo Morat
Framo - Worm gear sets (Framo-Norm) - Framo Morat
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Tolerance<br />
Backlash tolerances for worm <strong>gear</strong>s (valid for <strong>gear</strong>s with a pressure angle of 15°)<br />
ß corresponds to of<br />
the worm<br />
0<br />
Pitch diameter<br />
of the worm <strong>gear</strong><br />
d m2<br />
Lubrication<br />
Lubrication has an essential influence on efficiency, heat generation and life time. A good choice is a<br />
synthetic oils on the basis of polyglykol and synthetic oil or grease on the basis of polyalphaolefin.<br />
Moreover polyalphaolefin has a high compatibility to common sealing materials.<br />
High viscosity synthetic oils (ISO VG 680 bzw. ISO VG 1000) are used preferably for worm <strong>gear</strong> <strong>sets</strong>.<br />
In case of smaller center distances mineral or synthetic grease in consistency-class 0 up to 00 can be<br />
used as well.<br />
Comparison of the different basis oils<br />
Characteristics Mineral oil<br />
Viscosity at low temp. 4<br />
Wear protection<br />
Frictional behaviour<br />
High temp. Oxidation stability<br />
Water seperation ability<br />
Air release ability<br />
Rust protection<br />
Mix with mineral oil<br />
Laquer compatibility<br />
Seal compatibility<br />
m<br />
Low evaporation losses<br />
Module<br />
m n<br />
over 12 up to 25 0,4 - 0,6<br />
>0,6 - 1,3<br />
>1,3 - 2,0<br />
over 25 up to 50 0,4 - 0,6<br />
>0,6 - 1,3<br />
>1,3 - 2,0<br />
>2,0 - 4,0<br />
over 50 up to 100 0,4 - 0,6<br />
>0,6 - 1,3<br />
>1,3 - 2,0<br />
>2,0 - 4,0<br />
<strong>Framo</strong> - <strong>Worm</strong> <strong>gear</strong> <strong>sets</strong> (<strong>Framo</strong>-<strong>Norm</strong>)<br />
Backlash tol. at pitch diameter [mm]<br />
ß 0 up to 24° ß 0 over 24°<br />
min. max. min. max.<br />
0,07<br />
0,075<br />
0,08<br />
0,075<br />
0,08<br />
0,086<br />
0,094<br />
0,08<br />
0,086<br />
0,094<br />
0,102<br />
0,092<br />
0,099<br />
0,106<br />
0,099<br />
0,106<br />
0,114<br />
0,124<br />
0,106<br />
0,114<br />
0,124<br />
0,134<br />
0,077<br />
0,083<br />
0,089<br />
0,083<br />
0,089<br />
0,095<br />
0,103<br />
0,089<br />
0,095<br />
0,103<br />
0,112<br />
1=excellent 2=very good 3=good 4=sufficient 5=bad<br />
4<br />
3<br />
4<br />
4<br />
3<br />
1<br />
-<br />
1<br />
1<br />
4<br />
0,102<br />
0,109<br />
0,117<br />
0,108<br />
0,117<br />
0,125<br />
0,137<br />
0,117<br />
0,125<br />
0,137<br />
0,148<br />
The backlash values are based on an ideal center distance. More backlash will appear if the<br />
center distance is actually at the upper tolerance. 0.05mm above ideal center distance will<br />
result in 0.027 mm more backlash.<br />
Polyalphaolefin<br />
synth.<br />
3<br />
2<br />
2<br />
2<br />
2<br />
2<br />
1<br />
1<br />
1<br />
1<br />
1<br />
Polyglykol<br />
synth.<br />
<strong>Framo</strong> <strong>Morat</strong> GmbH & Co. KG Po-box 10 • D-79869 Eisenbach / Hochschwarzwald Phone +49(0)7657 / 88-0 • Fax +49(0)7657 / 88-444<br />
Höchst 7 • D-79871 Eisenbach / Hochschwarzwald<br />
Homepage: http://www. framo-morat.com E-Mail: info@framo-morat.com<br />
3<br />
1<br />
1<br />
1<br />
5<br />
4<br />
3<br />
5<br />
3<br />
3<br />
3<br />
29<br />
DS-129e2/12.06
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