Ohla Model 210-12 overhung load adapter.

Specifications
Input Standard: SAE A 2-Bolt Mount
Input Bore: 3/4" with keyway (3/16" x 3/32")
Input Bore Depth: 2.81"
Output Shaft: 1" with keyway (1/4" x 1/8")
Output Shaft Length: 2.87"
Input Pilot Diameter: 3.250"
Input Pilot Depth: 0.125" (std); 0.250" (deep)
Input Pilot Sealing Method: Buna-N Gasket
Output Pilot Diameter: 3.250"
Output Pilot Height: 0.120"
Max Speed (w/o modification): 3,800 RPM
Housing Material: Cast Iron
Shaft Material: 1144 Stressproof Steel
Bearing Type (std): Deep Groove Ball Bearings
Standard Lubrication Method: Grease
Optional Lubrication Methods: Contact Factory
Rec. Grease (typical app.): NLGI #2; Lithium Base
Minimum Grease Capacity: 0.5 oz.
Maximum Grease Capacity: 1.0 oz.
Grease Fitting: (1) Zerk Fitting (press-fit)
Unit Weight: 10 lbs
Standard Mounting Orientation: Shaft Horizontal - Consult Factory for other Mounting Orientations