Martin 5V · D-8
6 5V 490 SD
Exact Stock QD Hi-Cap wedge sheave identity and geometry from Martin's official sheave catalog.
Published catalog evidence
Exact manufacturer record
- Catalog number
- 6 5V 490 SD
- Belt section
- 5V
- Number of grooves
- 6
- Pitch diameter
- 4.9"
- Outside diameter
- 4.9"
- QD bushing
- SD
- Catalog page
- D-8
- Published row text
- 6 5V 490 SD 4 .90 4 .90 A-1 SD 2 0 .6875 1 .3125 1 .8125 1 .9375 9 .0 – – – – – – – – –
Verification boundary
What still needs to match
Belt and groovesConfirm the exact 3V, 5V, or 8V belt section, groove count, belt construction, and matched-set requirements.
Bushing and shaftVerify the QD bushing size, finished bore, shaft diameter, key/keyway, bushing orientation, and installation torque.
GeometryConfirm pitch diameter, outside diameter, sheave width, hub projection, guard clearance, and center-distance constraints.
Drive dutyCheck motor speed, sheave RPM, horsepower, service factor, belt speed, alignment, balance, environmental limits, and current manufacturer ratings.
Related catalog sheaves
Same section and groove count
5V · 6 grooves6 5V 465 SD4.65" PD · QD SD5V · 6 grooves6 5V 520 SD5.2" PD · QD SD5V · 6 grooves6 5V 440 SD4.4" PD · QD SD5V · 6 grooves6 5V 550 SD5.5" PD · QD SD5V · 6 grooves6 5V 590 SK5.9" PD · QD SK5V · 6 grooves6 5V 630 SK6.3" PD · QD SK5V · 6 grooves6 5V 670 SF6.7" PD · QD SF5V · 6 grooves6 5V 710 SF7.1" PD · QD SF