Board-dat/NWI/NWI1255-dat/NWI1255-dat.md
... ...
@@ -12,7 +12,7 @@
12 12
Updates version compare to [[NWI1254-dat]]:
13 13
14 14
- [[CONN-USB-Type-C-dat]] instead of micro USB
15
-- DB9 connector pre-added
15
+- DB9 connector pre-soldered
16 16
- [[ESP32-C3-dat]] external antenna version
17 17
18 18
Board-dat/PMP/PMP1037-dat/PMP1037-dat.md
... ...
@@ -1,6 +1,9 @@
1 1
2 2
# PMP1037-dat
3 3
4
+
5
+- [[PMP1036-dat]] - [[PMP1037-dat]]
6
+
4 7
[10Kits Magnetic Board Stand Spacer Sticker](https://www.electrodragon.com/product/5kits-magnetic-board-stand-spacer-sticker-size/) [Size]
5 8
6 9
Network-dat/RC-dat/rc-hack-dat/rc-hack-dat.md
... ...
@@ -47,6 +47,8 @@ fully fixed
47 47
48 48
49 49
50
+
51
+
50 52
## ref
51 53
52 54
Tech-dat/hack-dat/hack-dat.md
... ...
@@ -14,7 +14,7 @@
14 14
15 15
## invasive hack
16 16
17
-- [[screw-dat]] - [[Heat-Set-Insert-dat]]
17
+- [[screw-dat]]
18 18
19 19
- [[plastic-dat]] - [[plastic-soldering-dat]]
20 20
... ...
@@ -27,8 +27,11 @@
27 27
28 28
- [[insta360-dat]] - [[gopro-dat]] - [[insta360-go-rack-dat]] - [[gopro-amount-dat]]
29 29
30
+## mechanics
30 31
32
+- [[spacer-copper-dat]] - [[spacer-dat]]
31 33
34
+- [[Heat-Set-Insert-dat]]
32 35
33 36
## ref
34 37
mechanics-dat/mechanical-parts-dat/Insert-Heat-set-threaded-dat/Insert-Heat-set-threaded-dat.md
... ...
@@ -1,182 +0,0 @@
1
-
2
-# Heat-Set Threaded Inserts
3
-
4
-
5
-
6
-
7
-## Recommended Heat-Set Brass Insert Sizes (M4)
8
-
9
-Assumptions:
10
-- Common thermoplastics (ABS / PETG / PA)
11
-- Goal: balanced pull-out & torque strength
12
-- Rule: insert length ≈ 80–90% of sheet thickness
13
-
14
-| Sheet Thickness | Recommended Insert Length | Recommended OD Range | Notes |
15
-|-----------------|--------------------------|----------------------|-------|
16
-| 4 mm | 3.0 – 3.5 mm | 6.0 – 6.6 mm | Thin sheet → limit OD |
17
-| 5 mm | 4.0 – 4.5 mm | 6.6 – 7.2 mm | Typical standard |
18
-| 6 mm | 5.0 – 5.5 mm | 7.0 – 7.8 mm | High strength |
19
-
20
-- M4*3*6【20个】
21
-- M4*4*6【20个】
22
-- M4*5*6【20个】
23
-- M4*5.5*6【20个】
24
-
25
-
26
-## Recommended Heat-Set Brass Insert Sizes (M3)
27
-
28
-Assumptions:
29
-- Common thermoplastics (ABS / PETG / PA)
30
-- Goal: balanced pull-out & torque strength
31
-- Rule: insert length ≈ 80–90% of sheet thickness
32
-
33
-| Sheet Thickness | Recommended Insert Length | Recommended OD Range | Notes |
34
-| --------------- | ------------------------- | -------------------- | ---------------------- |
35
-| 4 mm | 3.0 – 3.5 mm | 4.4 – 4.8 mm | Avoid OD > 5.0 mm |
36
-| 5 mm | 4.0 – 4.5 mm | 4.8 – 5.4 mm | Best balance |
37
-| 6 mm | 5.0 – 5.5 mm | 5.2 – 6.0 mm | High pull-out strength |
38
-
39
-
40
-
41
-## M3 Insert Specifications
42
-
43
-| Thread Size | L | OD | |
44
-| ----------- | ---- | --- | -------- |
45
-| M3 | 2.5 | 4.0 | |
46
-| M3 | 3.0 | 4.0 | |
47
-| M3 | 3.5 | 4.0 | |
48
-| M3 | 4.0 | 4.0 | |
49
-| M3 | 4.5 | 4.0 | |
50
-| M3 | 5.0 | 4.0 | |
51
-| M3 | 5.5 | 4.0 | |
52
-| M3 | 6.0 | 4.0 | |
53
-| M3 | 7.0 | 4.0 | |
54
-| M3 | 8.0 | 4.0 | |
55
-| M3 | 9.0 | 4.0 | |
56
-| M3 | 10.0 | 4.0 | |
57
-| M3 | 3.0 | 4.2 | |
58
-| M3 | 4.0 | 4.2 | |
59
-| M3 | 5.0 | 4.2 | |
60
-| M3 | 6.0 | 4.2 | |
61
-| M3 | 7.0 | 4.2 | |
62
-| M3 | 8.0 | 4.2 | |
63
-| M3 | 9.0 | 4.2 | |
64
-| M3 | 10.0 | 4.2 | |
65
-| M3 | 3.0 | 4.5 | |
66
-| M3 | 3.5 | 4.5 | M4 sheet |
67
-| M3 | 3.6 | 4.5 | |
68
-| M3 | 4.0 | 4.5 | |
69
-| M3 | 4.5 | 4.5 | |
70
-| M3 | 5.0 | 4.5 | |
71
-| M3 | 6.0 | 4.5 | |
72
-| M3 | 7.0 | 4.5 | |
73
-| M3 | 8.0 | 4.5 | |
74
-| M3 | 9.0 | 4.5 | |
75
-| M3 | 10.0 | 4.5 | |
76
-| M3 | 12.0 | 4.5 | |
77
-| M3 | 3.0 | 4.6 | |
78
-| M3 | 3.5 | 4.6 | |
79
-| M3 | 4.0 | 4.6 | |
80
-| M3 | 4.5 | 4.6 | |
81
-| M3 | 5.0 | 4.6 | |
82
-| M3 | 5.5 | 4.6 | |
83
-| M3 | 5.7 | 4.6 | |
84
-| M3 | 6.0 | 4.6 | |
85
-| M3 | 7.0 | 4.6 | |
86
-| M3 | 8.0 | 4.6 | |
87
-| M3 | 9.0 | 4.6 | |
88
-| M3 | 10.0 | 4.6 | |
89
-| M3 | 3.0 | 5.0 | |
90
-| M3 | 3.5 | 5.0 | |
91
-| M3 | 4.0 | 5.0 | |
92
-| M3 | 4.5 | 5.0 | M5 sheet |
93
-| M3 | 5.0 | 5.0 | |
94
-| M3 | 5.5 | 5.0 | M6 sheet |
95
-| M3 | 6.0 | 5.0 | |
96
-| M3 | 6.5 | 5.0 | |
97
-| M3 | 7.0 | 5.0 | |
98
-| M3 | 7.5 | 5.0 | |
99
-| M3 | 8.0 | 5.0 | |
100
-| M3 | 9.0 | 5.0 | |
101
-| M3 | 10.0 | 5.0 | |
102
-| M3 | 12.0 | 5.0 | |
103
-| M3 | 4.0 | 5.5 | |
104
-| M3 | 5.0 | 5.5 | |
105
-| M3 | 6.0 | 5.5 | |
106
-| M3 | 8.0 | 5.5 | |
107
-
108
-## Installation Guidelines
109
-
110
-- **Recommended Hole Size**: For M3 inserts, typically use 4.0-4.5mm pilot hole (varies by outer diameter)
111
-- **Installation Method**: Heat the insert with a soldering iron and press into the pre-drilled hole
112
-- **Material**: Best used with plastics (ABS, PLA, PETG, Nylon, etc.)
113
-- **Temperature**: 200-250°C for most plastics
114
-
115
-
116
-
117
-## OD
118
-
119
-a larger OD (outer diameter) generally gives higher strength for a heat-set brass threaded insert, but only up to a limit, especially when the sheet thickness is fixed.
120
-
121
-Below is a clear engineering-style explanation 👇
122
-
123
-1. Why bigger OD helps (in theory)
124
-
125
-When sheet thickness is fixed, increasing insert OD:
126
-
127
-✔ Increases contact surface area with plastic
128
-
129
-✔ Increases shear area → better pull-out resistance
130
-
131
-✔ Reduces stress concentration around the insert
132
-
133
-✔ Improves torque resistance (anti-spin)
134
-
135
-So pull-out strength and torque strength both improve as OD increases.
136
-
137
-2. The practical limit (very important)
138
-
139
-When the sheet is thin, too large an OD becomes counter-productive.
140
-
141
-Problems if OD is too large:
142
-
143
-❌ Insufficient plastic wall thickness
144
-
145
-❌ Plastic may:
146
-
147
-Bulge
148
-
149
-Crack
150
-
151
-Weaken due to overheating
152
-
153
-❌ Insert may print through or distort the sheet
154
-
155
-❌ Strength plateaus or even drops
156
-
157
-3. Key rule of thumb (industry practice)
158
-
159
-For thermoplastics (ABS, PETG, PA, PC):
160
-
161
- Minimum plastic wall thickness ≥ 0.5 × insert OD
162
-
163
-
164
-And for sheet thickness:
165
-
166
- Insert length ≤ 0.8–0.9 × sheet thickness
167
-
168
-
169
-If you violate either rule, increasing OD does NOT improve strength.
170
-
171
-## Best strength strategy when thickness is fixed
172
-
173
-If sheet thickness cannot change:
174
-
175
-Priority order for strength improvement
176
-
177
-- Correct insert length (close to sheet thickness)
178
-- Knurled / helical / diamond OD geometry
179
-- Proper hole diameter (not oversized)
180
-- Controlled heating temperature
181
-- Then increase OD — only within wall-thickness limits
182
-
mechanics-dat/mechanical-parts-dat/copper-spacer-dat/copper-spacer-dat.md
... ...
@@ -1,3 +0,0 @@
1
-
2
-# copper-spacer-dat
3
-
mechanics-dat/mechanical-parts-dat/screw-dat/Heat-Set-Insert-dat/Heat-Set-Insert-dat.md
... ...
@@ -12,6 +12,188 @@
12 12
13 13
14 14
15
+# Insert-Heat-set-threaded-dat
16
+
17
+
18
+- [[Insert-Heat-set-threaded-dat]]
19
+
20
+## Recommended Heat-Set Brass Insert Sizes (M4)
21
+
22
+Assumptions:
23
+- Common thermoplastics (ABS / PETG / PA)
24
+- Goal: balanced pull-out & torque strength
25
+- Rule: insert length ≈ 80–90% of sheet thickness
26
+
27
+| Sheet Thickness | Recommended Insert Length | Recommended OD Range | Notes |
28
+|-----------------|--------------------------|----------------------|-------|
29
+| 4 mm | 3.0 – 3.5 mm | 6.0 – 6.6 mm | Thin sheet → limit OD |
30
+| 5 mm | 4.0 – 4.5 mm | 6.6 – 7.2 mm | Typical standard |
31
+| 6 mm | 5.0 – 5.5 mm | 7.0 – 7.8 mm | High strength |
32
+
33
+- M4*3*6【20个】
34
+- M4*4*6【20个】
35
+- M4*5*6【20个】
36
+- M4*5.5*6【20个】
37
+
38
+
39
+## Recommended Heat-Set Brass Insert Sizes (M3)
40
+
41
+Assumptions:
42
+- Common thermoplastics (ABS / PETG / PA)
43
+- Goal: balanced pull-out & torque strength
44
+- Rule: insert length ≈ 80–90% of sheet thickness
45
+
46
+| Sheet Thickness | Recommended Insert Length | Recommended OD Range | Notes |
47
+| --------------- | ------------------------- | -------------------- | ---------------------- |
48
+| 4 mm | 3.0 – 3.5 mm | 4.4 – 4.8 mm | Avoid OD > 5.0 mm |
49
+| 5 mm | 4.0 – 4.5 mm | 4.8 – 5.4 mm | Best balance |
50
+| 6 mm | 5.0 – 5.5 mm | 5.2 – 6.0 mm | High pull-out strength |
51
+
52
+
53
+
54
+## M3 Insert Specifications
55
+
56
+| Thread Size | L | OD | |
57
+| ----------- | ---- | --- | -------- |
58
+| M3 | 2.5 | 4.0 | |
59
+| M3 | 3.0 | 4.0 | |
60
+| M3 | 3.5 | 4.0 | |
61
+| M3 | 4.0 | 4.0 | |
62
+| M3 | 4.5 | 4.0 | |
63
+| M3 | 5.0 | 4.0 | |
64
+| M3 | 5.5 | 4.0 | |
65
+| M3 | 6.0 | 4.0 | |
66
+| M3 | 7.0 | 4.0 | |
67
+| M3 | 8.0 | 4.0 | |
68
+| M3 | 9.0 | 4.0 | |
69
+| M3 | 10.0 | 4.0 | |
70
+| M3 | 3.0 | 4.2 | |
71
+| M3 | 4.0 | 4.2 | |
72
+| M3 | 5.0 | 4.2 | |
73
+| M3 | 6.0 | 4.2 | |
74
+| M3 | 7.0 | 4.2 | |
75
+| M3 | 8.0 | 4.2 | |
76
+| M3 | 9.0 | 4.2 | |
77
+| M3 | 10.0 | 4.2 | |
78
+| M3 | 3.0 | 4.5 | |
79
+| M3 | 3.5 | 4.5 | M4 sheet |
80
+| M3 | 3.6 | 4.5 | |
81
+| M3 | 4.0 | 4.5 | |
82
+| M3 | 4.5 | 4.5 | |
83
+| M3 | 5.0 | 4.5 | |
84
+| M3 | 6.0 | 4.5 | |
85
+| M3 | 7.0 | 4.5 | |
86
+| M3 | 8.0 | 4.5 | |
87
+| M3 | 9.0 | 4.5 | |
88
+| M3 | 10.0 | 4.5 | |
89
+| M3 | 12.0 | 4.5 | |
90
+| M3 | 3.0 | 4.6 | |
91
+| M3 | 3.5 | 4.6 | |
92
+| M3 | 4.0 | 4.6 | |
93
+| M3 | 4.5 | 4.6 | |
94
+| M3 | 5.0 | 4.6 | |
95
+| M3 | 5.5 | 4.6 | |
96
+| M3 | 5.7 | 4.6 | |
97
+| M3 | 6.0 | 4.6 | |
98
+| M3 | 7.0 | 4.6 | |
99
+| M3 | 8.0 | 4.6 | |
100
+| M3 | 9.0 | 4.6 | |
101
+| M3 | 10.0 | 4.6 | |
102
+| M3 | 3.0 | 5.0 | |
103
+| M3 | 3.5 | 5.0 | |
104
+| M3 | 4.0 | 5.0 | |
105
+| M3 | 4.5 | 5.0 | M5 sheet |
106
+| M3 | 5.0 | 5.0 | |
107
+| M3 | 5.5 | 5.0 | M6 sheet |
108
+| M3 | 6.0 | 5.0 | |
109
+| M3 | 6.5 | 5.0 | |
110
+| M3 | 7.0 | 5.0 | |
111
+| M3 | 7.5 | 5.0 | |
112
+| M3 | 8.0 | 5.0 | |
113
+| M3 | 9.0 | 5.0 | |
114
+| M3 | 10.0 | 5.0 | |
115
+| M3 | 12.0 | 5.0 | |
116
+| M3 | 4.0 | 5.5 | |
117
+| M3 | 5.0 | 5.5 | |
118
+| M3 | 6.0 | 5.5 | |
119
+| M3 | 8.0 | 5.5 | |
120
+
121
+## Installation Guidelines
122
+
123
+- **Recommended Hole Size**: For M3 inserts, typically use 4.0-4.5mm pilot hole (varies by outer diameter)
124
+- **Installation Method**: Heat the insert with a soldering iron and press into the pre-drilled hole
125
+- **Material**: Best used with plastics (ABS, PLA, PETG, Nylon, etc.)
126
+- **Temperature**: 200-250°C for most plastics
127
+
128
+
129
+
130
+## OD
131
+
132
+a larger OD (outer diameter) generally gives higher strength for a heat-set brass threaded insert, but only up to a limit, especially when the sheet thickness is fixed.
133
+
134
+Below is a clear engineering-style explanation 👇
135
+
136
+1. Why bigger OD helps (in theory)
137
+
138
+When sheet thickness is fixed, increasing insert OD:
139
+
140
+✔ Increases contact surface area with plastic
141
+
142
+✔ Increases shear area → better pull-out resistance
143
+
144
+✔ Reduces stress concentration around the insert
145
+
146
+✔ Improves torque resistance (anti-spin)
147
+
148
+So pull-out strength and torque strength both improve as OD increases.
149
+
150
+2. The practical limit (very important)
151
+
152
+When the sheet is thin, too large an OD becomes counter-productive.
153
+
154
+Problems if OD is too large:
155
+
156
+❌ Insufficient plastic wall thickness
157
+
158
+❌ Plastic may:
159
+
160
+Bulge
161
+
162
+Crack
163
+
164
+Weaken due to overheating
165
+
166
+❌ Insert may print through or distort the sheet
167
+
168
+❌ Strength plateaus or even drops
169
+
170
+3. Key rule of thumb (industry practice)
171
+
172
+For thermoplastics (ABS, PETG, PA, PC):
173
+
174
+ Minimum plastic wall thickness ≥ 0.5 × insert OD
175
+
176
+
177
+And for sheet thickness:
178
+
179
+ Insert length ≤ 0.8–0.9 × sheet thickness
180
+
181
+
182
+If you violate either rule, increasing OD does NOT improve strength.
183
+
184
+## Best strength strategy when thickness is fixed
185
+
186
+If sheet thickness cannot change:
187
+
188
+Priority order for strength improvement
189
+
190
+- Correct insert length (close to sheet thickness)
191
+- Knurled / helical / diamond OD geometry
192
+- Proper hole diameter (not oversized)
193
+- Controlled heating temperature
194
+- Then increase OD — only within wall-thickness limits
195
+
196
+
15 197
16 198
17 199
mechanics-dat/mechanical-parts-dat/spacer-dat/spacer-copper-dat/spacer-copper-dat.md
... ...
@@ -0,0 +1,12 @@
1
+
2
+# spacer-copper-dat
3
+
4
+
5
+- [[spacer-copper-dat]] - [[spacer-dat]]
6
+
7
+
8
+
9
+
10
+
11
+## ref
12
+