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BP-016 · External gear pump
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1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A
A
B
B
C
C
D
D
E
E
F
F
B
B
C
98
37.57
G3/8
G1/2
122
80
1
4
5
12
SECTION A-A
ACROSS THE SHAFTS · SCALE 2:1
DETAIL C
THE MESH · ε = 1.21 · SCALE 5:1
A
A
D
73.6
27
2
3
14
7
13
F
SECTION B-B
ALONG THE SHAFTS · SCALE 1:1
9
15
8
6
DETAIL D
SHAFT SEAL · SCALE 5:1
Ø15
10
11
VIEW F
SHAFT END · ANTICLOCKWISE · 2:1
0
4
8
12
16
20
24
0.7
0.8
0.9
1.0
ηv
0
40
80
120
160
200
240
280
1000
2000
3000
OUTLET PRESSURE p, bar
FLOW Q, L/min
DIAGRAM 1
ACCENT: Q AT THIS SPEED · DASHED: V·n · DOTTED: ηv · THIN: rpm
0
80
160
240
0
120
240
360
TRAVEL FROM INLET, °
SPACE p, bar
DIAGRAM 2
ONE TOOTH SPACE · DASHED: OUTLET
NOTES
1. GEARS z 12, m 3, α 20°, x +0.3: a 37.57, αw 25.8°, da Ø43.35, b 11.6.
2. V = 2π·b·(ra² − rw² − pb²/12) = 8.04 cm³/rev; EACH SPACE 335 mm³.
3. Q = V·n·ηv. LEAKAGE QL = 0.00266·p·(1 + p/400) L/min, ISO VG 46 AT 50 °C.
4. T = V·p / (20π·ηhm) + 0.3 N·m, ηhm = 0.9. 250 bar NEEDS 35.8 N·m.
5. RELIEF GROOVES IN 6 VENT THE SPACE TRAPPED WHILE ε > 1.
6. B-B STEPPED THROUGH TWO SCREWS; SHAFTS, SCREWS, KEY, WASHERS NOT HATCHED.
7. DRIVE ANTICLOCKWISE SEEN ON THE SHAFT END. INLET G1/2, OUTLET G3/8.
8. MOTION SHOWN AT 1/300 OF REAL SPEED.
ITEM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DESCRIPTION
BODY, 2-BORE
FRONT FLANGE, SPIGOT Ø50
REAR COVER
DRIVE GEAR SHAFT z12 m3 x+0.3
DRIVEN GEAR SHAFT z12 m3 x+0.3
FRONT BUSHING, D-FORM
REAR BUSHING, D-FORM
PLAIN BEARING 16×18×14 ISO 3547
SHAFT SEAL 16×28×7 DIN 3760 A
CIRCLIP 28×1.2 DIN 472
PARALLEL KEY 5×5×16 DIN 6885 A
SCREW M8×70 ISO 4762
WASHER 8 ISO 7089
BODY SEAL, FIGURE-8, Ø2 CORD
BALANCE SEAL, 3-FORM
MATERIAL
EN AW-6082 T6
EN AC-46000
EN-GJL-250
16MnCr5, CASE 58 HRC
16MnCr5, CASE 58 HRC
CuSn12-C
CuSn12-C
STEEL / PTFE
FKM 75
C75S
C45+C
STEEL 10.9
STEEL 300 HV
NBR 90
FKM 80
QTY
1
1
1
1
1
2
2
4
1
1
1
4
4
2
1
TITLE
EXTERNAL GEAR PUMP 8 cm³
DWG NO
BP-016
SCALE
2:1
SIZE
A2
SHEET
1 / 1
DRAWN
CLAUDE
DATE
2026-10-15
MATERIAL
SEE PARTS LIST
GENERAL TOL.
ISO 2768-m
UNITS
mm · bar · L/min
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