Precision bore & concentricity
The bore becomes the datum for hobbing and assembly, so bore size, end-to-end diameter, and concentricity are controlled before the part leaves the lathe.
Industries Served
Mechanical Power Transmission Equipment
Precision machining for gears and power transmission components.
Montgomery Precision machines the precision components used in mechanical power transmission systems, from very small gears to large gears approaching 14 inches in diameter.
We perform the turning and milling operations that require tight dimensional control before and after gear cutting, and support both low-volume and repeat production where consistency from part to part is critical.
What we build
Gears, gear blanks, hubs & shafts up to ~14 inches.
Many gear components depend on the relationship between the bore and the finished tooth geometry. Each project is reviewed for geometry, material, tolerance, heat treatment, gear cutting requirements, inspection, and quantity.
Materials
Carbon steels
Alloy steels
Pre-hardened steels
Stainless steels
Aluminum
Engineering plastics
- Spur, bevel, and helical gears
- Gear blanks
- Hubs
- Shafts
- Sleeves and bushings
- Spacers
- Precision bores
- Keyway features, flats, and bolt-hole patterns
- Gear-related housings and supports
- Custom and legacy replacement gears
Turning and milling in-house
Facing, OD turning, boring, threading, and hub work on two CNC turning centers; bolt patterns, keyway features, flats, and pockets on the horizontal mill.
Coordinated gear hobbing
Blank preparation, bores, and milled features in-house, with gear cutting and heat treatment coordinated through our manufacturing network before final inspection.
- Max diameter, approx.
- ~14"
- Bore tolerance, approx.
- ~0.0005"
- Concentricity, part dependent
- ~0.0002–0.001"
- CNC turning centers
- 2× Puma 10S
Typical gear component workflow
Gear blank prep
Precision bore
OD & face
Milling
Gear hobbing
Inspection
Have a gear or power transmission project?
Whether your project involves a small spur gear, large gear blank, precision bore requirement, or recurring production order, send us your drawing, CAD model, material, gear specifications, quantity, critical tolerances, and delivery date.