Martin 8V · D-28
12 8V 4450 TB
Exact Stock Taper Bushed Hi-Cap wedge sheave identity and published geometry from Martin's official catalog.
Published catalog evidence
Exact manufacturer record
- Catalog number
- 12 8V 4450 TB
- Belt section
- 8V
- Groove count
- 12
- Pitch diameter
- 44.5"
- Outside diameter
- 44.5"
- Taper bushing
- 6050
- Published row
- 10 8V 4450 TB 44 .5 44 .5 A-3 6050 6 2 .25 5 4 .375 701 .0 12 8V 4450 TB A-3 6050 6 4 5 4 .875 814 .0
Verification boundary
What still needs to match
Belt and groovesConfirm exact belt section, groove count, and matched-set requirements.
Bushing and shaftVerify taper-bushing number, finished bore, shaft, keyway, and installation.
GeometryCheck pitch diameter, OD, sheave width, alignment, guard clearance, and center distance.
Drive dutyConfirm RPM, horsepower, service factor, balance, environment, and current manufacturer limits.
Related catalog sheaves
Same section and groove count
8V · 12 grooves12 8V 4000 TB40" PD · bushing 60508V · 12 grooves12 8V 5300 TB53" PD · bushing 70608V · 12 grooves12 8V 3550 TB35.5" PD · bushing 60508V · 12 grooves12 8V 3000 TB30" PD · bushing 60508V · 12 grooves12 8V 2480 TB24.8" PD · bushing 50508V · 12 grooves12 8V 2240 TB22.4" PD · bushing 50508V · 12 grooves12 8V 2120 TB21.2" PD · bushing 50508V · 12 grooves12 8V 2000 TB20" PD · bushing 5050