Alpha Spiral Bevel Gear – for AIR-850
The Alpha Spiral Bevel Gear, part 658-116, is a drivetrain gear for the Alpha AIR-850 pneumatic wet polisher, listed on Alpha's own parts schematic as the spiral bevel gear for the AIR-850 and AIR-854. It is an internal machine part, supplied as one gear.
Ordering the wrong part in this block costs a machine-down day, because the neighbouring part numbers are close together and describe different components. Part 658-116 is the gear for the AIR-850 and AIR-854; 658-117 is the mating pinion for the same machines; 658-17 is the gear for the AIR-830 and AIR-834; and 658-25 is the pinion for the AIR-830 and AIR-834.
Key Features
- Spiral bevel gear, Alpha part number 658-116
- Listed by Alpha for the AIR-850 and AIR-854 pneumatic polishers
- Not the pinion — the mating pinion for these machines is a different part number (658-117)
- Does not fit the AIR-830 or AIR-834, which use their own gear and pinion part numbers
- Supplied as one gear
What's Included
- 1 spiral bevel gear
Who Is This For?
Service technicians and shop mechanics rebuilding the drive end of an Alpha AIR-850 or AIR-854 pneumatic polisher. It is not a consumable and not a user-facing accessory — if the machine is not one of those models, this is the wrong part number.
Frequently Asked Questions
Which machines does Alpha part 658-116 fit?
Alpha's parts schematic lists 658-116 as the spiral bevel gear for the AIR-850 and AIR-854 pneumatic polishers.
Is this the gear or the pinion?
This is the gear. Gear and pinion are the two halves of a mating pair, not two names for the same part; the spiral bevel pinion for the AIR-850 and AIR-854 is part 658-117.
Will this gear fit an Alpha AIR-830 or AIR-834?
No. Alpha lists a different spiral bevel gear, part 658-17, for the AIR-830 and AIR-834.
Are gear and pinion sold together?
No. This listing is one gear. If the pinion is also worn, order it separately by its own part number.