Is cineál imthacaí liathróid groove domhain iad imthacaí maighnéad nach bhfuil ach gualainn amháin ar an taobh amuigh ar thaobh amháin.Tá groove istigh beagán níos éadomhain acu freisin.Is imthacaí beaga iad imthacaí maighnéada le trastomhas tollta de 4 go 20 mm, is minic a aimsítear imthacaí Magneto ar ghineadóirí, mótair agus innill seanfheithiclí.
Uimhir imthacaí | Príomhtoisí (mm) | Bunrang rátáil ualach |
d | D1 | B | rmin | r1nóim | Cr(KN) | Cor(KN) |
E5 | 5 | 16 | 5 | 0. 15 | 0.1 | 1.56 | 0.28 |
E6 | 6 | 21 | 7 | 0.3 | 0. 15 | 2.85 | 0. 48 |
E7 | 7 | 22 | 7 | 0.3 | 0. 15 | 3.1 | 0.55 |
E8 | 8 | 24 | 7 | 0.3 | 0. 15 | 3.25 | 0. 61 |
E9 | 9 | 28 | 8 | 0.3 | 0. 15 | 4.25 | 0.83 |
E10 | 10 | 28 | 8 | 0.3 | 0. 15 | 4.25 | 0.83 |
E12 | 12 | 32 | 7 | 0.3 | 0. 15 | 3.4 | 0.8 |
E13 | 13 | 30 | 7 | 0. 15 | 0. 15 | 3.4 | 0.8 |
E15 | 15 | 35 | 8 | 0. 15 | 0. 15 | 4.5 | 1.1 |
BO15 | 15 | 40 | 10 | 0.6 | 0.6 | 7.35 | 1.7 |
L17 | 17 | 40 | 10 | 0.3 | 0.3 | 5.7 | 1. 43 |
BO17 | 17 | 44 | 11 | 0.6 | 0.6 | 8.8 | 2. 08 |
E20 | 20 | 47 | 12 | 0.6 | 0.6 | 8.8 | 2.24 |
L20 | 20 | 47 | 14 | 0.6 | 0.6 | 8.8 | 2.24 |
M20 | 20 | 52 | 15 | 0.6 | 0.6 | 12.2 | 3 |
L25 | 25 | 52 | 15 | 0.6 | 0.6 | 8.65 | 2.4 |
M25 | 25 | 60 | 17 | 0.6 | 0.6 | 16 | 4. 05 |