drilling and tapping Inconel
drilling and tapping Inconel
(OP)
i never worked with inconel and need to know what kind of drill and taps i'll need and any tips on coolant and feeds and speeds . thanks hooked
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
drilling and tapping Inconel
|
drilling and tapping Inconeldrilling and tapping Inconel(OP)
i never worked with inconel and need to know what kind of drill and taps i'll need and any tips on coolant and feeds and speeds . thanks hooked
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: drilling and tapping Inconel
2. Drilling: use steady feed rates-- don't allow the tool to dwell, which causes work hardening at the bottom of the hole, and makes cutting more difficult once it resumes. Set-up should be as rigid as possible, using stub drills and jigs where possible.
Heavy-duty high speed steel drills with a heavy web can be used. Grades T15, M41, M42, & M43 are recommended. Carbide tools are also used. TiN coated tools will have lower friction, hence reducing tool temperature and wear.
To minimize work hardening, use positive rake angles with adequate relief. Cutting pressures are reduced and a positive effective rake maintained if the web is thinned at the chisel point. Increasing the point angle to 135 degrees can be helpful.
Feeds and speeds: For unaged condition, speed should be 3-4 m/min, or 10-12 sfm. Aged condition is 2-3 m/min, or 8-10 sfm. Feeds depend on diameter:
Drill diameter Feed
mm mm/rev
<1.5 0.0125-0.025
1.5-3 0.025-0.05
3-4.75 0.05-0.10
6-8 0.075-0.125
9.5-11 0.10-0.175
13-17 0.15-0.25
19-25 0.20-0.38
3. Tapping: Drill size should be 50-55% of thread depth. Speeds should be ~ 1.5-3 m/min or 5-10 sfm. Inconel alloys are best tapped using serial taps, which are standard taps modified in diameter so that each successive tap increases the thread diameter proportionately. Tap in the unaged condition if possible. Ample cutting fluid is necessary for either hand or machine tapping; chlorinated waxes being the preferred type.