When evaluating a used Barber Colman 16-36, the real story is in the mechanical condition, lubrication system, alignment, and electrical integrity. On this machine, the work completed so far includes checking runout, measuring worm wheel backlash, installing a new lead nut, going through all lube lines, checking and replacing meters, verifying overarm alignment, verifying tailstock alignment, performing a zero brake check, and checking and replacing electrical components as needed.
For buyers and operators of used GEAR HOBBERS, these are the kinds of details that matter. A machine can appear complete on the floor, but long-term accuracy and reliability depend on how well these critical systems are inspected and corrected.
Barber Colman 16-36 Work Completed So Far
- Check runout
- Check worm wheel backlash
- Install new lead nut
- Go through all lube lines
- Check and replace meters
- Verify overarm alignment
- Verify tailstock alignment
- Perform zero brake check
- Check and replace electricals
Why Each Step Matters on a Barber Colman 16-36
1. Runout Check
Runout affects how true the rotating elements of the machine track during operation. On a gear hobber, excessive runout can show up as inconsistent tooth quality, poor surface finish, and repeatability problems. Checking runout is one of the first steps in understanding whether the machine is suitable for accurate work or needs further correction.
2. Worm Wheel Backlash Check
Worm wheel backlash is a critical wear point in many older gear machines. Too much backlash can affect indexing consistency and ultimately gear quality. Measuring it gives a clearer picture of the machine's mechanical condition and helps identify whether the drive train is still within a usable range for production or toolroom work.
3. New Lead Nut
Installing a new lead nut addresses wear in one of the machine's important feed-related components. A worn lead nut can introduce play, affect feed accuracy, and make machine movement less predictable. Replacing it is a practical step toward improving control and reducing slop in operation.
4. Lube Line Review
Going through all lube lines is essential on any legacy machine tool, especially a gear hobber with multiple moving and load-bearing surfaces. Blocked, damaged, or neglected lines can starve key components of lubrication, accelerating wear and creating avoidable failure points. A proper review helps confirm that oil can reach the points where it is needed.
5. Meter Check and Replacement
Lubrication meters regulate oil flow to specific areas of the machine. If meters are clogged, inconsistent, or failed, the machine may look fine while internal wear continues unchecked. Checking and replacing meters where needed supports a healthier lubrication system and better long-term machine life.
6. Overarm Alignment
Overarm alignment plays a direct role in setup stability and cutting support. If alignment is off, the machine may not hold the cutter or supporting elements correctly under load. Verifying this alignment helps protect accuracy and supports more reliable cutting performance.
7. Tailstock Alignment
Tailstock alignment is another important checkpoint, especially where workholding and part support are involved. Misalignment can lead to poor tracking, inconsistent results, and unnecessary stress on the setup. Checking tailstock alignment is a basic but important part of evaluating whether a used hobber is ready for dependable work.
8. Zero Brake Check
The zero brake system affects positioning and machine control. A proper zero brake check helps confirm that the machine can stop and hold where it should. On older equipment, this is not something to gloss over. It is a functional checkpoint that can influence setup confidence and repeatability.
9. Electrical Check and Replacement
Electrical components are often one of the biggest unknowns on older machine tools. Brittle wiring, worn switches, aging relays, and questionable connections can all create downtime risk. Checking and replacing electricals where needed helps improve reliability and makes the machine more practical for real shop use rather than just a power-on demonstration.
Why This Process Matters on Used Gear Hobbing Equipment
A used gear hobber should be judged by more than whether it turns on. Mechanical wear, alignment, lubrication delivery, and electrical condition all affect whether the machine can hold setup, run consistently, and produce acceptable results. That is why work like this matters on a Barber Colman 16-36.
For shops considering older hobbing equipment, the most valuable machines are often the ones that have been carefully reviewed at the system level. Inspection points like backlash, lead nut condition, lube delivery, and alignment tell you far more than a cosmetic walk-around ever will.
Support for Buyers Looking at Barber Colman Equipment
Piselli Enterprises works with used gear cutting equipment, including BARBER COLMAN machines. For buyers searching under the alternate spelling, we also handle equipment commonly referred to as BARBER COLEMAN machines. In either case, the value is in understanding the actual machine condition, the work completed, and what still may need attention before installation or production use.
If you are comparing gear hobbing machines, it helps to ask practical questions:
- Has runout been checked?
- What is the measured worm wheel backlash?
- Has the lubrication system been inspected all the way through?
- Are metering units functioning properly?
- Have alignment checks been completed?
- What electrical components have been checked or replaced?
Those answers can tell you far more about a machine than a simple description or a fresh coat of paint.
Conclusion
The work completed so far on this Barber Colman 16-36 reflects the areas that matter most on a used gear hobber: accuracy, wear points, lubrication, alignment, braking function, and electrical reliability. Checking runout, worm wheel backlash, lead nut condition, lube lines, meters, overarm alignment, tailstock alignment, zero brake function, and electrical components gives a much clearer picture of machine condition.
If you are looking for used gear cutting equipment or want to discuss available GEAR HOBBERS, Piselli Enterprises can help you evaluate the details that make the difference between a machine that merely powers up and one that is worth putting on your floor.
