Hardinge Dividing/Indexing Head Plates

Background

I picked up a Hardinge dividing head and it only came with one dividing head plate. To get other divisions I modeled four of them based on the factory indexing hole count specifications and measurements from my single dividing plate. For a wealth of Hardinge Lathe and Mill information, refer to [email protected] | Home and [email protected] | Home.

Description

Accompanying Dividing Head Calculator - Google Sheets

Sheet 2, “Plates,” outlines the stock Hardinge dividing head plates. Each of the plates herein have 6 concentric circles of holes. The number of holes for each circle were inspired from the stock Hardinge plates; I took the unique number of hole circles and offer four plates for you to print:

Hole Counts for PA-15: 15/16/17/18/19/24
Hole Counts for PA-20: 20/21/23/27/29/31
Hole Counts for PA-33: 33/37/39/41/43/47
Hole Counts for PA-48: 48/49/66/70/75/90

I did not print the bolt hole chamfers because it's cleaner to use a chamfer cutter and less print time.

Sheet 1, “Plate Finder,” may be used to determine which dividing head plate you'll need for the number of divisions you're after. It also calculates the number of spaces one will have to travel for each division. Note that the Hardinge dividing head is a 4:1 gear ratio, however most dividing heads are 40:1; you can adjust this in the Dividing Head Calculator I created.

Note: 90 holes at the outer ring is about the max one can fit. There are other ways to get divisions above this, but the Dividing Head Hole Calculator and the models herein do not offer this.

Settings

I started with a 0.6 mm nozzle but was not happy with the resolution around the dividing head holes. I used a 0.4mm nozzle, PETG, and 100% infill. I found that print time was greatly reduced if I used a rectilinear infill pattern and used zero top and bottom layers. The goal was to reduce the travel numbers as much as possible and I believed I optimized all I could for this with Prusa Slicer. Print time is about 4 hours for the PA-48 plate.

This may be needless to say, but if you want an accurate dividing plate, you need to calibrate your printer first. Visit Calibration | Prusa Knowledge Base.

Rules

• Please abide by the license and do not print these for commercial use. 
• Please do not sell these for profit.
• Please leave a tip if you find it useful.
• Please reach out to me if you'd like me to print one for you.