Fittings and adapters
2-Lobe Rotary Lobe Pump (Assembled)
- Bounding box
- 190.0 × 135.0 × 28.0 mm
- Engine
- Precision B-rep
- Parameters
- 14
- Published
- September 14, 2026
Download
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The prompt
(defun c:PUMP1 () (setq osm (getvar "osmode")) (setvar "osmode" 0) ;; Body 190 x 135 (command "_.RECTANG" "0,0" "190,135") ;; Flange holes 4x d9 (command "_.CIRCLE" "10,10" "4.5") (command "_.CIRCLE" "180,10" "4.5") (command "_.CIRCLE" "10,125" "4.5") (command "_.CIRCLE" "180,125" "4.5") ;; Inlet Outlet 1 inch = 25.4mm (command "_.CIRCLE" "0,67.5" "12.7") (command "_.CIRCLE" "190,67.5" "12.7") ;; Center distance 45mm (setq c1x 72.5 c1y 67.5) (setq c2x 117.5 c2y 67.5) ;; Lobe OD 64mm (command "_.CIRCLE" (strcat (rtos c1x) "," (rtos c1y)) "32") (command "_.CIRCLE" (strcat (rtos c2x) "," (rtos c2y)) "32") ;; Shaft 16mm (command "_.CIRCLE" (strcat (rtos c1x) "," (rtos c1y)) "8") (command "_.CIRCLE" (strcat (rtos c2x) "," (rtos c2y)) "8") ;; Keyway 5mm (command "_.RECTANG" (strcat (rtos (- c1x 2.5)) ",75") (strcat (rtos (+ c1x 2.5)) ",78")) (command "_.RECTANG" (strcat (rtos (- c2x 2.5)) ",75") (strcat (rtos (+ c2x 2.5)) ",78")) ;; Dimensions (command "_.DIMLINEAR" "0,0" "190,0" "190,-10") (command "_.DIMLINEAR" "0,0" "0,135" "-10,67.5") (command "_.DIMLINEAR" (strcat (rtos c1x) "," (rtos c1y)) (strcat (rtos c2x) "," (rtos c2y)) "95,145") (command "_.DIMDIAMETER" (strcat (rtos c1x) "," (rtos c1y)) "72.5,105") ;; Text Notes (command "_.MTEXT" "95,160" "95,170" "Lobe Pump 1 inch - 2 Lobe - Face Width 28mm - Clearance 0.25mm") (setvar "osmode" osm) (princ "\nDrawing Complete. Type PUMP1 to run again") ) (princ "\nType PUMP1 to draw pump")
Parameters
| Name | Value | Range |
|---|---|---|
| Housing Length | 190 mm | 120 – 320 |
| Housing Width | 135 mm | 80 – 260 |
| Face Width | 28 mm | 10 – 60 |
| Flange Hole Dia | 9 mm | 3 – 20 |
| Flange Hole Inset | 10 mm | 4 – 30 |
| Inlet / Outlet Port Dia | 25.4 mm | 4 – 60 |
| Lobe Rotor OD | 64 mm | 30 – 110 |
| Lobe Rotor Thickness | 28 mm | 8 – 60 |
| Rotor Center Distance | 45 mm | 24 – 90 |
| Rotor / Bore Clearance | 0.25 mm | 0.05 – 2 |
| Keyway Width | 5 mm | 2 – 12 |
| Keyway Depth | 2.5 mm | 1 – 6 |
| Shaft Dia | 16 mm | 6 – 40 |
| Shaft Length | 28 mm | 8 – 80 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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