- Joined
- Jan 4, 2021
- Messages
- 2,704
Thank you!
no not really.
And while not a really cheap bargain, it’s still a hell of a deal.
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What Did You Buy Today?
- Thread starter darkzero
- Start date
And while not a really cheap bargain, it’s still a hell of a deal.
- Joined
- Dec 20, 2021
- Messages
- 1,029
OK. I'll add fuel...
Zeroed the arbor on the grinding indexer to check for runout. With 1/8" in the chuck there is .0003" TIR. With 3/16" in there .0001" TIR...
I'm going to stop looking at this now, It's probably going down hill if I look any closer....
Guessing this sort of stuff is why they're so expensive. I might be afraid to use it!
Bought two 18x24 surface plates for $60 USD at auction. I think they went cheap (for where I live) because they were described as "granite blocks". No name plates on either.
The one of the right seems to be in excellent condition. Probably because the other plate was kept on top.
The one on the left has me confused. The assumed top is rough and has cutting groves like when it was cut from the larger slab. The underside the surface is smooth, but has groves cut into the plate. Maybe it was never a surface plate to begin with I don't know.
They both got a bath! And I'm happy with my purchase
If anyone has any idea about the groves, I'd like to here it.
The one of the right seems to be in excellent condition. Probably because the other plate was kept on top.
The one on the left has me confused. The assumed top is rough and has cutting groves like when it was cut from the larger slab. The underside the surface is smooth, but has groves cut into the plate. Maybe it was never a surface plate to begin with I don't know.
They both got a bath! And I'm happy with my purchase
If anyone has any idea about the groves, I'd like to here it.
Attachments
- Joined
- Nov 25, 2015
- Messages
- 9,477
I'm betting it's a jigging plate, and the grooves are the top. The hole maybe for a rod, does that insert have threads?
The bottom roughness is of no consequence if it sits on three points of contact. It can be easily leveled.
Just guessing.
The bottom roughness is of no consequence if it sits on three points of contact. It can be easily leveled.
Just guessing.
There was a female flare fitting on the bottom, and the hole does have a threaded insert.
- Joined
- Nov 24, 2014
- Messages
- 3,502
The grooves and the threaded metal fitting make me think it was a plane fluid bearing. A fluid would be plumbed into the fitting, under pressure and distributed by the grooves, to facilitate very low resistance freedom of movement (2 dimensional sliding). The pressurized fluid would "lift" the top plate allowing it to essentially "float" on a layer of the fluid. The fluid might be air, water, oil or ???
If the setup was a fluid bearing, I would expect the faying surfaces are pretty flat.
However, they are not surface plates for metrology until they are properly supported and calibrated.
If the setup was a fluid bearing, I would expect the faying surfaces are pretty flat.
However, they are not surface plates for metrology until they are properly supported and calibrated.
- Joined
- Aug 19, 2023
- Messages
- 1,104
Bit of an "ouch" moment of £565.03p GBP ($738.62c USD / $1011.73c CAD) on this bill, but replacing stock and adding new cut-off/parting/grooving tools could not be put off any further.
List as follows...
10pcs SP200 (GTN2) Grooving Parting Off
10pcs MGMN200-G NC3030 (GTN2) Parting Insert
10pcs 11IR AG60 H01 Aluminium Internal Insert
10pcs MRMN200-M NC3030/PC9030 Round Inserts
10pcs RCGT0602-MO H01 Aluminium Inserts
10pcs MGMN300-M NC3030/PC9030 Parting Inserts
10pcs CCGT060202-AK H01 CCGT21.50 Aluminium Inserts
10pcs SP300 NC3030 (GTN3) Grooving Parting Inserts
10pcs MRMN300-M NC3030/PC9030 Round Inserts
10pcs MMT 11ER AG55 UE6020 External Inserts
10pcs DCGT070202-AK H01 DCGT21.50 Aluminium Inserts
10pcs SP200 (GTN2) Grooving Parting Inserts
10pcs 11ER AG60 H01 Aluminium External Inserts
10pcs DCMT070204 US735 Inserts
10pcs MGGN200R-8 H01 Parting Inserts Aluminium R/H
10pcs MGMN300-M H01 Parting Aluminium Inserts
10pcs MGGN300R-8 H01 Parting Inserts Aluminium R/H
10pcs DCGT070204-AK H01 DCGT21.51 Aluminium Inserts
10pcs MRMN300-M NC3030/PC9030 Parting Round nose Inserts
MGEHR1212-2 Parting Grooving Lathe Tool Holder 12mm
MGEHR1212-3 Parting Grooving Lathe Tool Holder 12mm
1pc Carbide Insert Boxes + Lids - White
5pcs Carbide Insert Boxes + Lids - White
10pcs Carbide Insert Boxes + Lids - White
19/2 REPLACEMENT INDEXABLE PARTING BLADE 19MM
10MM PARTING OFF SYSTEM CUT OFF TOOL BLOCK BLADE + 3MM
Q TYPE Parting tool 12mmx2mm (GTN2)
Q TYPE Parting tool 12mmx3mm (GTN3)
8pc 250-001 Tool Holder
4.2x7.4mm Counterbore
40mm x 20mm x 300mm Aluminium Plate
50pcs M5x.08 12.9 nuts
List as follows...
10pcs SP200 (GTN2) Grooving Parting Off
10pcs MGMN200-G NC3030 (GTN2) Parting Insert
10pcs 11IR AG60 H01 Aluminium Internal Insert
10pcs MRMN200-M NC3030/PC9030 Round Inserts
10pcs RCGT0602-MO H01 Aluminium Inserts
10pcs MGMN300-M NC3030/PC9030 Parting Inserts
10pcs CCGT060202-AK H01 CCGT21.50 Aluminium Inserts
10pcs SP300 NC3030 (GTN3) Grooving Parting Inserts
10pcs MRMN300-M NC3030/PC9030 Round Inserts
10pcs MMT 11ER AG55 UE6020 External Inserts
10pcs DCGT070202-AK H01 DCGT21.50 Aluminium Inserts
10pcs SP200 (GTN2) Grooving Parting Inserts
10pcs 11ER AG60 H01 Aluminium External Inserts
10pcs DCMT070204 US735 Inserts
10pcs MGGN200R-8 H01 Parting Inserts Aluminium R/H
10pcs MGMN300-M H01 Parting Aluminium Inserts
10pcs MGGN300R-8 H01 Parting Inserts Aluminium R/H
10pcs DCGT070204-AK H01 DCGT21.51 Aluminium Inserts
10pcs MRMN300-M NC3030/PC9030 Parting Round nose Inserts
MGEHR1212-2 Parting Grooving Lathe Tool Holder 12mm
MGEHR1212-3 Parting Grooving Lathe Tool Holder 12mm
1pc Carbide Insert Boxes + Lids - White
5pcs Carbide Insert Boxes + Lids - White
10pcs Carbide Insert Boxes + Lids - White
19/2 REPLACEMENT INDEXABLE PARTING BLADE 19MM
10MM PARTING OFF SYSTEM CUT OFF TOOL BLOCK BLADE + 3MM
Q TYPE Parting tool 12mmx2mm (GTN2)
Q TYPE Parting tool 12mmx3mm (GTN3)
8pc 250-001 Tool Holder
4.2x7.4mm Counterbore
40mm x 20mm x 300mm Aluminium Plate
50pcs M5x.08 12.9 nuts
Last edited:
- Joined
- Dec 18, 2019
- Messages
- 7,220
That's a lot of inserts! Especially parting inserts. I've only used HSS blades for parting. Are the carbide parting inserts that good? Do you part stainless steel? That's the only material that has ever given me grief, everything else just cuts. It seems you ought to be set for a while with inserts.
I've never experienced having to pay for the insert boxes, wow, things are different across the pond.
- Joined
- Aug 19, 2023
- Messages
- 1,104
I buy bulk precisely so they DO last a while. This little lot will last me quite a time. Makes sense to have it on-hand when I need it, than have to wait around on a specific insert type to finish a job. Been there, done that, not doing it again. Once was enough.
As for the stainless inserts, I find they hold up better to non-stainless steels as well as other materials better.
Found that the Aluminium inserts (CCGT et-al) are excellent with silver steel and the Stainless inserts are great on plastics.
Parting stainless... Never had any problems with that. Normal steels? different story!
As for the boxes... That is a concious choice to buy white boxes. I separate my inserts into Red / White /Blue boxes depending on what the insert type is. Normal inserts (CCMT et-al) go into white boxes, Aluminium inserts (CCGT et-al) go in blue boxes, Stainless inserts go in red boxes. Makes it easier "at-a-glance" in the drawer to see which are which.
Last edited:
- Joined
- Dec 18, 2019
- Messages
- 7,220
Good idea on the color coding.