Difference between revisions of "JST JGD-125C Water Cooled Spindle"

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A 5.5kW / 6kW Chinese water cooled spindle with an ER25 collet chuck. It is marketed for stone engraving rather than CNC routing.
 
A 5.5kW / 6kW Chinese water cooled spindle with an ER25 collet chuck. It is marketed for stone engraving rather than CNC routing.
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 +
== Wiring ==
 +
 +
Power inlet "WEIPU WS20" circular connector wiring:
 +
 +
{| class="wikitable"
 +
! Pin
 +
! Wire Color
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|-
 +
| 1
 +
| yellow
 +
|-
 +
| 2
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| blue
 +
|-
 +
| 3
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| red
 +
|-
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| 4
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| (ground)
 +
|}
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 +
The spindle has male pins inside an externally threaded receptacle.
  
 
== Replacement Parts ==
 
== Replacement Parts ==
Line 12: Line 35:
  
 
<pre>SKF E2 6004-2Z/C3 15 260 K</pre>
 
<pre>SKF E2 6004-2Z/C3 15 260 K</pre>
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 +
=== Bottom Locknut ===
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 +
Doubles as a dust shield:
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 +
* 56.7mm OD
 +
* 5.1mm thick (dust shield portion)
 +
* 4x 3.5mm holes 3mm deep on a 44mm diameter circle
 +
* must get past a 33.3mm diameter spindle nose before threading into place
 +
 +
=== Top Locknut ===
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 +
* 32mm overall OD
 +
* 10mm thick
 +
* M20x1.0mm threads on the ID
 +
* 26mm OD / 22mm ID rim for bearing's inner shield
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* 1.8mm clearance around the rim for the bearing's shield, as well as a shoulder with no threads on the inside
  
 
=== O-rings ===
 
=== O-rings ===
  
−
Must fit within a 10mm OD 1mm deep recess with a 6mm ID hole for water to pass through. Maybe one of these?:
+
The top cap with the water inlets have 10mm OD 1mm deep recesses with a 6mm ID hole for O-rings. Maybe for one of these?:
  
 
* [https://www.mcmaster.com/1171N144/ Square-Profile Oil-Resistant Buna-N O-Ring, 1.5 mm Wide, 7 mm ID | McMaster-Carr]
 
* [https://www.mcmaster.com/1171N144/ Square-Profile Oil-Resistant Buna-N O-Ring, 1.5 mm Wide, 7 mm ID | McMaster-Carr]
Line 23: Line 63:
 
* [https://www.mcmaster.com/1302N037/ Oil-Resistant Buna-N O-Ring, 1.8 mm Wide, 6 mm ID | McMaster-Carr]
 
* [https://www.mcmaster.com/1302N037/ Oil-Resistant Buna-N O-Ring, 1.8 mm Wide, 6 mm ID | McMaster-Carr]
 
* [https://www.mcmaster.com/9262K166/ Oil-Resistant Buna-N O-Ring, 2 mm Wide, 6 mm ID | McMaster-Carr]
 
* [https://www.mcmaster.com/9262K166/ Oil-Resistant Buna-N O-Ring, 2 mm Wide, 6 mm ID | McMaster-Carr]
 +
 +
The bearing housing portion of the spindle has 8mm OD 1mm deep recesses with 4mm ID holes for O-rings. Maybe for one of these?:
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 +
* [https://www.mcmaster.com/9262K627/ Oil-Resistant Buna-N O-Ring, 1.5 mm Wide, 4.5 mm ID | McMaster-Carr]
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* [https://www.mcmaster.com/9262K163/ Oil-Resistant Buna-N O-Ring, 2 mm Wide, 4 mm ID | McMaster-Carr] (verified)
  
 
=== Fasteners ===
 
=== Fasteners ===
Line 58: Line 103:
 
4x [https://www.mcmaster.com/91290A228/ Alloy Steel Socket Head Screw, Black-Oxide, M5 x 0.8 mm Thread, 12 mm Long | McMaster-Carr]
 
4x [https://www.mcmaster.com/91290A228/ Alloy Steel Socket Head Screw, Black-Oxide, M5 x 0.8 mm Thread, 12 mm Long | McMaster-Carr]
  
−
=== Upper Rotor Bore Cover ===
+
==== Upper Rotor Bore Cover ====
  
 
For holding a lid over the upper part of the rotor to protect the floating bearings from contamination:
 
For holding a lid over the upper part of the rotor to protect the floating bearings from contamination:
Line 64: Line 109:
 
3x [https://www.mcmaster.com/91290A148/ Alloy Steel Socket Head Screw, Black-Oxide, M4 x 0.7 mm Thread, 12 mm Long | McMaster-Carr]
 
3x [https://www.mcmaster.com/91290A148/ Alloy Steel Socket Head Screw, Black-Oxide, M4 x 0.7 mm Thread, 12 mm Long | McMaster-Carr]
  
−
=== Spindle Top Cap ===
+
==== Spindle Top Cap ====
  
 
For holding the water inlet/electrical inlet cap onto the main spindle body:
 
For holding the water inlet/electrical inlet cap onto the main spindle body:

Latest revision as of 21:10, 23 May 2022

Overview

A 5.5kW / 6kW Chinese water cooled spindle with an ER25 collet chuck. It is marketed for stone engraving rather than CNC routing.

Wiring

Power inlet "WEIPU WS20" circular connector wiring:

Pin Wire Color
1 yellow
2 blue
3 red
4 (ground)

The spindle has male pins inside an externally threaded receptacle.

Replacement Parts

Angular Contact Bearings

7007C T 2RZ HQ1 P4 DBL Z3X 131018044B

Deep Groove Bearings

SKF E2 6004-2Z/C3 15 260 K

Bottom Locknut

Doubles as a dust shield:

  • 56.7mm OD
  • 5.1mm thick (dust shield portion)
  • 4x 3.5mm holes 3mm deep on a 44mm diameter circle
  • must get past a 33.3mm diameter spindle nose before threading into place

Top Locknut

  • 32mm overall OD
  • 10mm thick
  • M20x1.0mm threads on the ID
  • 26mm OD / 22mm ID rim for bearing's inner shield
  • 1.8mm clearance around the rim for the bearing's shield, as well as a shoulder with no threads on the inside

O-rings

The top cap with the water inlets have 10mm OD 1mm deep recesses with a 6mm ID hole for O-rings. Maybe for one of these?:

The bearing housing portion of the spindle has 8mm OD 1mm deep recesses with 4mm ID holes for O-rings. Maybe for one of these?:

Fasteners

Dust Shield

For holding the dust shield to the lower angular contact bearing retaining ring:

4x Alloy Steel Socket Head Screw, Black-Oxide, M4 x 0.7 mm Thread, 8 mm Long | McMaster-Carr

Lower Angular Contact Bearing Retaining Ring

For holding the lower angular contact bearing retaining ring to the bearing housing:

4x Alloy Steel Socket Head Screw, Black-Oxide, M4 x 0.7 mm Thread, 12 mm Long | McMaster-Carr

There are two M4-0.7 tapped holes 9.5mm deep for jacking the ring away from the housing, we used 25mm long screws.

Bearing Housing

Grub screws w/ teflon tape for sealing some water ports (manufacturing process side effect?):

2x Alloy Steel Cone-Point Set Screw, M6 x 1 mm Thread, 8 mm Long | McMaster-Carr

TODO verify the following:

For holding the bearing housing to the main spindle body:

6x Alloy Steel Socket Head Screw, Black-Oxide, M5 x 0.8 mm Thread, 16 mm Long | McMaster-Carr

Upper Angular Contact Bearing Retaining Ring

For holding the upper angular contact bearing retaining ring onto the housing:

4x Alloy Steel Socket Head Screw, Black-Oxide, M5 x 0.8 mm Thread, 12 mm Long | McMaster-Carr

Upper Rotor Bore Cover

For holding a lid over the upper part of the rotor to protect the floating bearings from contamination:

3x Alloy Steel Socket Head Screw, Black-Oxide, M4 x 0.7 mm Thread, 12 mm Long | McMaster-Carr

Spindle Top Cap

For holding the water inlet/electrical inlet cap onto the main spindle body:

6x Alloy Steel Socket Head Screw, Black-Oxide, M5 x 0.8mm Thread, 35mm Long, Partially Threaded | McMaster-Carr

TODO military connector screws?

Online Resources

JGD 125C Spindle Motor 5.5 KW ER25 Stone Water Cooling Cnc Milling Machine Spindle 380v / 220v 4pcs Bearing High Speed|Machine Tool Spindle| - AliExpress

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