Martin 5V · D-8
7 5V 2120 J
Exact Stock QD Hi-Cap wedge sheave identity and geometry from Martin's official sheave catalog.
Published catalog evidence
Exact manufacturer record
- Catalog number
- 7 5V 2120 J
- Belt section
- 5V
- Number of grooves
- 7
- Pitch diameter
- 21.2"
- Outside diameter
- 21.2"
- QD bushing
- J
- Catalog page
- D-8
- Published row text
- 6 5V 2120 F 21 .20 21 .20 A-3 F 3 .9375 0 .3125 1 .3125 3 .625 0 .5 110 .0 7 5V 2120 J C–3 J 4 .5 0 .1875 1 .3125 4 .5 0 .4375 138 .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 · 7 grooves7 5V 2360 J23.6" PD · QD J5V · 7 grooves7 5V 1870 F18.7" PD · QD F5V · 7 grooves7 5V 1600 F16" PD · QD F5V · 7 grooves7 5V 1500 F15" PD · QD F5V · 7 grooves7 5V 2800 J28" PD · QD J5V · 7 grooves7 5V 1400 F14" PD · QD F5V · 7 grooves7 5V 1320 F13.2" PD · QD F5V · 7 grooves7 5V 1250 F12.5" PD · QD F