Dry vacuum pump

LOT Dry Vacuum Pump Maintenance Parts — Part Numbers & OEM Replacement Solutions

This article systematically organizes the maintenance parts material codes for LOT Vacuum (Eilote) LOT1200 / LOT HD2000 / LOT 2000 series dry screw vacuum pumps, covering **43 core part numbers** and corresponding Taixing replacement solutions. This article lists item by item in 7 major categories "rotor blank - shaft - baffle - gear - locating - bushing - seal", and provides procurement recommendations.

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Product Details

I. 43 Part Numbers Summary Table (by Category)

Category 1: Rotor Blanks (3 pieces)

No.	Part Number	Product Name	Spec	Category
1	—	Lower Pump Rotor Blank	LOT1200 Lower Pump Rotor Blank	Rotor Blank
2	—	Lower Pump Rotor Blank	LOT 2000 Lower Pump Rotor Blank	Rotor Blank
3	—	Lower Pump Rotor Blank	LOT HD2000 Lower Pump Rotor Blank	Rotor Blank

Category 2: Shaft Blanks (10 pieces)

No.	Part Number	Product Name	Spec	Category
4	—	Upper Pump X & Y Rotor Shaft	LOT 1200 Upper Pump X/Y	Shaft
5	—	Lower Pump X & Y Rotor Shaft	LOT 1200 Lower Pump X/Y	Shaft
6	—	Upper Pump X & Y Rotor Shaft	LOT 2000 Upper Pump X/Y	Shaft
7	—	Lower Pump X & Y Rotor Shaft	LOT 2000 Lower Pump X/Y	Shaft
8	—	Upper Pump X & Y Rotor Shaft	LOT HD2000 Upper Pump X/Y	Shaft
9	—	Lower Pump X & Y Rotor Shaft	LOT HD2000 Lower Pump X/Y	Shaft
10	—	Upper Pump Shaft Blank	LOT1200 Upper Pump Shaft Blank	Shaft Blank
11	—	Lower Pump Shaft Blank	LOT1200 Lower Pump Shaft Blank	Shaft Blank
12	—	Upper Pump Shaft Blank	LOT 2000 Upper Pump Shaft Blank	Shaft Blank
13	—	Lower Pump Shaft Blank	LOT 2000 Lower Pump Shaft Blank	Shaft Blank

Category 3: Baffle Assemblies (7 pieces)

No.	Part Number	Product Name	Spec	Category
14	—	Lower Pump Motor Side Baffle	LOT1200 Lower Pump Motor End Baffle	Baffle
15	—	Lower Pump Rear Side Baffle	LOT1200 Lower Pump Tail End Baffle	Baffle
16	—	Lower Pump Gearbox Side Baffle	LOT HD2000 Lower Pump Gearbox End Spacer	Baffle
17	—	Lower Pump Motor Side Baffle	LOT HD2000 Lower Pump Motor End Baffle	Baffle
18	—	Upper Pump Gear Side Baffle	LOT HD2000 Upper Pump Gear End Baffle	Baffle
19	—	Upper Pump Motor Side Baffle	LOT 2000 Upper Pump Motor End Baffle	Baffle
20	—	Lower Pump Baffle Seal Seat	LOT1200 Lower Pump Baffle Seal Seat	Seal Seat

Category 4: Drive Gears (4 pieces)

No.	Part Number	Product Name	Spec	Category
21	—	Upper Pump Gear	LOT1200 Upper Pump Gear	Gear
22	—	Lower Pump Gear	LOT1200 Lower Pump Gear	Gear
23	—	Upper Pump Gear	LOT HD2000 Upper Pump Gear	Gear
24	—	Lower Pump Gear	LOT HD2000 Lower Pump Gear	Gear

Category 5: Positioning Hardware (4 pieces)

No.	Part Number	Product Name	Spec	Category
25	—	Lower Pump Locating Pin	LOT1200 Lower Pump Dowel Pin Φ10×28L	Locating Pin
26	—	Upper Pump Locating Pin	LOT1200 Upper Pump Positioning Pin Φ10×28L	Locating Pin
27	—	Lower Pump Locating Pin	LOT HD2000 Lower Pump Dowel Pin Φ10×28L	Locating Pin
28	—	Lower Pump Locating Pin	LOT HD2000 Lower Pump Positioning Pin Φ12×28L	Locating Pin

Category 6: Bushings & Oil Deflectors (5 pieces)

No.	Part Number	Product Name	Spec	Category
29	—	Lower Pump Motor Side Bushing	LOTHD2000 Lower Pump Motor Shaft Sleeve	Bushing
30	—	Lower Pump Motor Side Bushing	LOT1200 Lower Pump Motor Shaft Sleeve	Bushing
31	—	Upper Pump Motor Side Bushing	LOT 2000 Upper Pump Motor Shaft Sleeve	Bushing
32	—	Lower Pump Motor Side Oil Deflector	LOT1200 Lower Pump Motor End Oil Shield	Oil Deflector
33	—	Lower Pump Motor Side Oil Deflector	LOTHD2000 Lower Motor End Oil Baffle	Oil Deflector

Category 7: Sealing Components (10 pieces)

No.	Part Number	Product Name	Spec	Category
34	—	Lower Pump Shaft Seal	LOT1200 Backing Pump Seal 325015.3	Shaft Seal
35	—	Lower Pump Shaft Seal	LOTHD2000 Lower Pump Shaft Seal	Shaft Seal
36	—	Lower Pump Shaft Piston Ring	LOT1200 Lower Pump Shaft Piston Ring	Piston Ring
37	—	Lower Pump Shaft Piston Ring	LOTHD2000 Lower Pump Shaft Piston Ring	Piston Ring
38	—	Upper Pump Shaft Piston Ring	LOT 2000 Upper Pump Shaft Piston Ring	Piston Ring
39	—	Lower Pump Seal Kit	Seal Kit for LOT1200 Lower Pump	Seal Kit
40	—	Upper Pump Seal Kit	Seal Kit for LOT1200 Upper Pump	Seal Kit
41	—	Lower Pump Seal Kit	Seal Kit for LOT 2000 Lower Pump	Seal Kit
42	—	Upper Pump Seal Kit	Seal Kit for LOT 2000 Upper Pump	Seal Kit
43	—	Lower Pump Baffle Seal Seat	LOTHD2000 Lower Pump Baffle Seal Seat	Seal Seat

Important Note: Material codes are Taixing internal codes (OEM-spec), different from LOT original part numbers, but products fully match OEM specifications.

II. Key Parts Price Reference

2.1 X/Y Rotor Shaft

· OEM Price: ¥4,500-5,500/piece

· Taixing Replacement: ¥2,300-2,800/piece

· Savings**: 49%

2.2 Gear

· OEM Price: ¥5,500-7,000/piece

· Taixing Replacement: ¥2,800-3,500/piece

· Savings**: 49%

2.3 Baffle

· OEM Price: ¥4,000-5,000/piece

· Taixing Replacement: ¥2,000-2,500/piece

· Savings**: 50%

2.4 Seal

· OEM Price: ¥800-1,500/piece

· Taixing Replacement: ¥400-750/piece

· Savings**: 50%

III. 43 Part Numbers Procurement Recommendations

Parts Category	Recommended Procurement	Reason
Rotor Blank	Taixing Replacement	Nodular iron QT600-3 + Nodularization rate ≥85% strict matching
X/Y Rotor Shaft	Taixing Replacement	40Cr tempered + Dynamic balance G2.5 strict matching
Baffle	Taixing Replacement	Gray iron + H7 inner hole accuracy matching
Gear	Taixing Replacement	20CrMnTi carburized HRC58-62 strict matching
Locating Pin	Taixing Replacement	GCr15 quenched HRC58-62 strict matching
Bushing	Taixing Replacement	Nodular iron + Copper lining matching
Seal	Taixing Replacement	Fluorocarbon FKM strict matching

Key Experience: All 43 part numbers can be supplied with Taixing replacement parts comparable to OEM quality and 48-50% cost savings.

IV. Bulk Procurement Discounts

Quantity	Discount	Stocking Suggestion
Single piece	Standard price	Urgent repair
5-10 pieces	9.5 fold	Quarterly maintenance package
20+ pieces	9 fold	Annual overhaul package
50+ pieces	8.5 fold	Fab customer annual agreement