- Joined
- Jul 25, 2007
- Messages
- 1,380
Pics here https://www.flickr.com/photos/110785734@N05/albums/72157659862547056
Includes:
3-speed grinder with 2HP Leeson motor, Beaumont wheels, forward/reverse-on/off switch, wired for 220V - (as shown in pics)
Base/stand made from extruded aluminum framing and 3/4" thick 6061 plate (as shown in pics)
Custom 6-axis work rest assembly (as shown in pics)
Tool arm with 10" Beaumont contact wheel (as shown in pics)
Tool arm with Beaumont flat platen and glass platen liner (not shown in pics)
Beaumont small wheel attachment (no tool arm) with 1" and 1/2" contact wheels (not shown in pics)
Standard custom work rest - bolts to tool arm (not shown in pics)
5" Beaumont contact wheel (not shown in pics)
2" Beaumont contact wheel (not shown in pics)
Extra work rest stops (not shown in pics)
Extra Igus DryLin W hardware (not shown in pics)
The grinder is built to a considerable level of precision. All mating end cuts have been milled square, and the receiver is fastened with locating pins and bolts.
The 6-axis work rest is built to a high level of precision and rigidity; perpendicularity and all critical dimensions have been machined or ground to ±0.001". It moves independently in three linear directions and three rotational directions: pitch is +100°, -15° (approx) of motion. Roll and yaw are ±5° of motion. The pitch rotates around a hardened/ground Ø35mm shaft, while the roll and yaw rotate around hardened/ground Ø8mm pins. All hardware uses a 6mm allen key. The main linear slide uses a Igus DryLin W linear rail/bearing/clamp system bolted to 1" thick Mic-6 jig plate http://www.igus.com/wpck/3596/drylin_w?C=US&L=en. The bearings are impervious to dirt/grit and require no lubrication. The vertical slide uses a precision-ground square shaft and custom square shaft clamps. The left-to-right motion is minimal and intended to allow for initial set-up only. You can see me standing on the work rest at the end of this video https://youtu.be/0B3HkL4RNDI?t=2m8s
The main virtue of the work rest is repeatability - you take some time to get it squared-up to your grinder. After than, every time you put the work rest in, it is in the same alignment. The work rest is perfect for scandi and saber grinds - it allows you to set both grind angle and depth of cut. Unfortunately, the work rest table cannot be configured in a vertical position like a MAPP arm can. However, it is completely modular and you can make new components as desired.
The bad news is that the grinder has some tracking issues when using the flat platen, especially in reverse. I have been able to work around the issue with the creative placement of shims. I believe the issue is the Ø2" wheels on the flat platen attachment, but I haven't bothered to replace them. The grinder has seen some very heavy use and I imagine the motor will expire soon.
I'm asking $1800 for everything. I have more than $1500 in the work rest alone. At this time I am not considering shipping - local pickup at 19512. I have a 20-ton press that I will include for an additional $150. Thank you!
Includes:
3-speed grinder with 2HP Leeson motor, Beaumont wheels, forward/reverse-on/off switch, wired for 220V - (as shown in pics)
Base/stand made from extruded aluminum framing and 3/4" thick 6061 plate (as shown in pics)
Custom 6-axis work rest assembly (as shown in pics)
Tool arm with 10" Beaumont contact wheel (as shown in pics)
Tool arm with Beaumont flat platen and glass platen liner (not shown in pics)
Beaumont small wheel attachment (no tool arm) with 1" and 1/2" contact wheels (not shown in pics)
Standard custom work rest - bolts to tool arm (not shown in pics)
5" Beaumont contact wheel (not shown in pics)
2" Beaumont contact wheel (not shown in pics)
Extra work rest stops (not shown in pics)
Extra Igus DryLin W hardware (not shown in pics)
The grinder is built to a considerable level of precision. All mating end cuts have been milled square, and the receiver is fastened with locating pins and bolts.
The 6-axis work rest is built to a high level of precision and rigidity; perpendicularity and all critical dimensions have been machined or ground to ±0.001". It moves independently in three linear directions and three rotational directions: pitch is +100°, -15° (approx) of motion. Roll and yaw are ±5° of motion. The pitch rotates around a hardened/ground Ø35mm shaft, while the roll and yaw rotate around hardened/ground Ø8mm pins. All hardware uses a 6mm allen key. The main linear slide uses a Igus DryLin W linear rail/bearing/clamp system bolted to 1" thick Mic-6 jig plate http://www.igus.com/wpck/3596/drylin_w?C=US&L=en. The bearings are impervious to dirt/grit and require no lubrication. The vertical slide uses a precision-ground square shaft and custom square shaft clamps. The left-to-right motion is minimal and intended to allow for initial set-up only. You can see me standing on the work rest at the end of this video https://youtu.be/0B3HkL4RNDI?t=2m8s
The main virtue of the work rest is repeatability - you take some time to get it squared-up to your grinder. After than, every time you put the work rest in, it is in the same alignment. The work rest is perfect for scandi and saber grinds - it allows you to set both grind angle and depth of cut. Unfortunately, the work rest table cannot be configured in a vertical position like a MAPP arm can. However, it is completely modular and you can make new components as desired.
The bad news is that the grinder has some tracking issues when using the flat platen, especially in reverse. I have been able to work around the issue with the creative placement of shims. I believe the issue is the Ø2" wheels on the flat platen attachment, but I haven't bothered to replace them. The grinder has seen some very heavy use and I imagine the motor will expire soon.
I'm asking $1800 for everything. I have more than $1500 in the work rest alone. At this time I am not considering shipping - local pickup at 19512. I have a 20-ton press that I will include for an additional $150. Thank you!
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