Pellet Machine with Automatic Grease Pump 0.5-5 t/h | Supplier Guide
News 2026-06-20
A pellet machine with automatic grease pump is a mechanical compaction unit that transforms biomass residues, feed formulations, or agricultural by-products into dense cylindrical pellets. The integrated automatic lubrication system delivers precise grease volumes to main bearings and roller shafts at preset intervals, reducing manual intervention and ensuring consistent lubricant film under continuous heavy-load operation.
Technical Specifications & Performance Parameters
| Parameter | Value Range / Specification |
|---|---|
| Throughput capacity | 0.5 – 5.0 t/h (feedstock-dependent) |
| Main motor power | 55 – 160 kW (IE3 / IE4 compatible) |
| Ring die inner diameter | 400 – 800 mm |
| Pellet diameter | 6 – 12 mm (customisable) |
| Pellet bulk density | 600 – 750 kg/m³ |
| Raw material moisture | 12% – 18% (optimal: 14% – 16%) |
| Specific energy consumption | 28 – 35 kWh/t |
| Core wear parts service life | Ring die: 800 – 1,200 h; Roller shells: 600 – 900 h |
| Automatic grease pump reservoir capacity | 2 – 5 L (refill interval: 200 – 400 operating hours) |
| Scheduled manual maintenance | 2 – 3 h / month (inspection only; lubrication automated) |
📄 Download the complete technical datasheet with lubrication schedule and dimensional drawings.
[Request Quotation / Get PDF Technical Datasheet]
Structural Composition & Material Selection
The pellet machine with automatic grease pump comprises four integrated subsystems with defined material grades:
Mechanical System
- Ring die: Forged alloy steel (20CrMnTi) with carburised hardening layer (HRC 58–62)
- Roller shells: High-chromium cast iron (Cr26) with wear-resistant overlay
- Main shaft: Heat-treated 42CrMo4 steel with induction-hardened journals
Support System
- Bearing housings: Ductile cast iron (QT600-3) with precision-machined seating
- Base frame: Welded structural steel, stress-relief annealed, with vibration-damping mounts
Lubrication System
- Automatic grease pump: Progressive distributor block, NLGI grade 2 grease compatible
- Delivery lines: Stainless steel tubing (6 mm OD) with compression fittings
- Pressure relief valve: Set at 25 MPa to protect distribution lines
Control System
- PLC-based lubrication controller with HMI interval programming (1–999 minutes)
- Low-level grease alarm and pressure switch interlock
- Optional remote monitoring via MODBUS RTU
Manufacturing Process – Engineering Workflow
Step 1 – Raw Material Preparation & Grinding
Hammer mill with 2.0–3.0 mm screen for feed; 4.0–6.0 mm for biomass. Magnetic separator removes ferrous contaminants. Moisture adjusted to 14%–16% via batch dryer.
Step 2 – Conditioning & Steam Treatment
Double-shaft paddle conditioner with steam injection at 0.2–0.4 MPa. Retention time 45–60 seconds. Mash temperature elevated to 80–95°C for starch gelatinisation.
Step 3 – Pelletising (Core Forming Process)
Main motor drives ring die rotation at 4–8 m/s peripheral speed. Roller gap maintained at 0.15–0.30 mm. Automatic grease pump delivers 0.2–0.5 cc per cycle to each bearing point every 8–12 minutes.
Step 4 – Counterflow Cooling
Ambient air drawn counter-current through pellet bed. Retention time 6–10 minutes. Pellet exit temperature ≤ ambient +5°C. Final moisture ≤12%.
Step 5 – Screening & Bagging
Vibrating screener (two decks: 4 mm and 2 mm apertures) removes fines and broken pellets. Fines recirculated to conditioning. Automatic bagging scale with ±0.2% tolerance.
Industry Comparison – Alternative Technologies
| Machine Type | Raw Material Adaptability | Capacity (t/h) | Bearing Life (h) | Typical Application |
|---|---|---|---|---|
| Pellet Machine with Auto Grease Pump | Wide: 12%–18% moisture | 0.5 – 5.0 | 6,000 – 8,000 | Feed, biomass, fertiliser |
| Manual-Lubrication Pellet Machine | Wide, but operator-dependent | 0.5 – 5.0 | 4,000 – 5,500 | Feed mills with dedicated maintenance crews |
| Fixed-speed Pellet Mill | Narrow: 14%–16% only | 1.0 – 4.0 | 4,500 – 6,000 | Single-species feed production |
| Flat-die Pellet Machine | Very narrow: ≤14% moisture | ≤0.5 | 2,500 – 3,500 | Small farms, pilot plants |
Differentiation (Shandong Changsheng Machinery):
Our automatic grease pump system eliminates manual lubrication scheduling errors. Progressive distributor ensures each bearing receives equal grease volume regardless of line resistance. The PLC memory stores 12 months of lubrication history for predictive maintenance planning. Bearing service life extended by 30%–45% compared to manual-lubrication equivalents.
📄 Compare lubrication systems across models – request our bearing life calculation tool.
[Request Quotation / Download Engineering Drawing]
Application Scenarios by Buyer Role
Distributors / Importers
Focus on grease pump compatibility with locally available NLGI grades and spare parts commonality across models. Require multilingual HMI interfaces for diverse end-user markets.
EPC Contractors
Integrating the pellet machine into complete feed or biomass lines. Need lubrication piping layouts and PLC handshake protocols for central control room integration.
Engineering Consultants / Technical Advisors
Evaluate total cost of ownership – reduced manual labour hours and bearing replacement frequency. Require grease consumption data for operational cost modelling.
End-user Production Facilities
Operating 24/6 or 24/7 schedules. Demand automated lubrication to eliminate production interruptions and ensure consistent grease application during night shifts with reduced supervision.
Core Pain Points & Engineering Solutions
Pain Point 1 – Bearing failures from irregular manual greasing
Root cause: Operators skip lubrication during peak production or apply inconsistent grease volumes, leading to metal-to-metal contact and premature bearing seizure.
Solution: Automatic grease pump with fixed-volume progressive distributors eliminates human error. Each bearing receives 0.2–0.5 cc per cycle at programmable intervals (8–15 minutes) regardless of operator attention.
Pain Point 2 – Grease contamination from over-lubrication
Root cause: Manual greasing often results in excess grease purging past seals, attracting dust and abrasive particles that accelerate wear.
Solution: PLC-controlled dosing matches manufacturer-recommended grease volumes. Pressure switch detects blocked lines and triggers alarm before seal damage occurs.
Pain Point 3 – Unplanned downtime during night shifts
Root cause: Maintenance crews unavailable during off-hours; manual greasing neglected for 8–12 hour intervals, causing bearing temperature rise and eventual shutdown.
Solution: Automated system operates continuously; low-level grease alarm gives 8-hour advance warning before reservoir refill is required, enabling planned intervention.
Pain Point 4 – Inconsistent pellet quality from roller bearing wear
Root cause: Uneven roller bearing clearance due to inadequate lubrication increases roller-die gap variation, producing fines and weak pellets.
Solution: Consistent lubricant film maintains roller shaft position within tolerance; PDI (pellet durability index) variation reduced from ±2.5% to ±0.8%.
Critical Risk Warnings & Mitigation Measures
Risk 1 – Grease line blockage causing bearing starvation
Mitigation: Install pressure sensor at each distributor outlet. Program PLC to alert at 18 MPa (normal operating: 20–23 MPa). Schedule quarterly line flushing with solvent.
Risk 2 – Incompatible grease grades leading to pump failure
Mitigation: Specify NLGI grade 2 lithium-complex grease only. Confirm base oil viscosity (ISO VG 220) with supplier. Request grease sample analysis upon delivery.
Risk 3 – Low-level alarm ignored during continuous operation
Mitigation: Integrate low-level signal into central DCS or SCADA with audible annunciator. Maintain one spare grease reservoir ready for quick changeover (≤5 minutes).
Procurement Selection Guide – 7 Executable Steps
Step 1 – Define your production capacity requirement
Calculate target throughput at 80% motor load. For 2.5 t/h demand, select 3.0–3.2 t/h rated model.
Step 2 – Analyse feedstock moisture variability
If incoming moisture ranges beyond 12%–18%, require pre-drying system. Automatic lubrication does not compensate for moisture – specify dryer capacity accordingly.
Step 3 – Verify grease compatibility with local suppliers
Confirm NLGI grade 2 availability in your region. Our pump is calibrated for 220 cSt base oil – substitutions require re-calibration.
Step 4 – Evaluate control interface integration
Specify MODBUS RTU or Profibus DP if plant uses central monitoring. Ensure HMI language supports your operator team (English / Spanish / French options available).
Step 5 – Calculate total lubricant consumption per year
Average consumption: 0.3–0.6 L per bearing per 1,000 hours. Multiply by number of bearings (4–6) and annual hours to estimate operating cost.
Step 6 – Review spare parts for lubrication system
Check availability of distributor blocks, pressure switches, and pump seals. Our standard parts are interchangeable with ISO 1219 pneumatic/hydraulic fittings.
Step 7 – Audit installation space and access
Ensure grease reservoir is accessible for refill (top clearance ≥500 mm). Route tubing away from hot surfaces (die area temperatures up to 85°C).
Engineering Case Study – Biomass Plant in Poland
Project Background
A wood pellet production facility in western Poland operated four manual-lubrication pellet machines (90 kW each) processing pine and spruce sawdust at 3.8–4.2 t/h combined output.
Initial Problem
Bearing replacement frequency averaged 4,200 hours – well below the 6,000-hour design target. Unplanned stops due to bearing overheating occurred 6–8 times per month, each costing 45–90 minutes of production loss.
Root Cause Analysis
Shift logs showed grease application intervals varied from 6 to 18 hours depending on operator workload. Three bearings showed evidence of both starvation (scored raceways) and over-lubrication (heat-degraded grease).
Solution Implemented
Retrofitted two machines with Shandong Changsheng automatic grease pump systems, progressive distributors, and PLC controllers. Programmed 10-minute intervals with 0.3 cc per cycle. Retained two machines on manual schedule as control.
Final Data Results (12-month average)
| Metric | Before (Manual) | After (Auto Grease Pump) |
|---|---|---|
| Bearing service life | 4,200 h | 6,700 h (+59%) |
| Unplanned stops / month | 7.2 | 1.8 |
| Average production loss (h/month) | 7.5 | 1.2 |
| Grease consumption (L/bearing/1,000h) | 0.95 (inconsistent) | 0.52 (consistent) |
| Roller-die gap variation | ±0.09 mm | ±0.03 mm |
| Pellet PDI (durability) | 94.5% | 96.8% |
Frequently Asked Questions (FAQ)
1. What raw materials can this pellet machine process?
It processes animal feed (corn, soybean, wheat), biomass (wood, straw, bagasse), and organic fertiliser blends with moisture 12%–18%.
2. How does the automatic grease pump improve bearing life?
It delivers precise, equal grease volumes at fixed intervals, eliminating human error in lubrication scheduling.
3. What grease grade is recommended?
NLGI grade 2 lithium-complex grease with ISO VG 220 base oil. Equivalent grades from major brands are acceptable.
4. How often does the grease reservoir need refilling?
Every 200–400 operating hours depending on model and cycle setting. The PLC displays remaining volume percentage.
5. Is the automatic pump compatible with existing control systems?
Yes. It supports MODBUS RTU, Profibus DP, and hardwired I/O signals for central monitoring.
6. What is the typical energy consumption per tonne?
Between 28–35 kWh/t depending on feedstock, die size, and operating parameters.
7. How long do wear parts last?
Ring die: 800–1,200 hours; Roller shells: 600–900 hours under normal conditions.
8. Can the pump operate with different grease grades?
Only with recalibration of dosing volumes. Pump and distributor are designed for NLGI 0–2 but factory setting is for grade 2.
9. Does the automatic system reduce manual maintenance completely?
Manual inspection remains – checking for leaks, line integrity, and bearing temperature – but greasing labour is eliminated.
10. What safety features does the lubrication system include?
Low-level alarm, pressure switch for blocked lines, and automatic shutdown interlock if bearing temperature exceeds 75°C.
11. Is this machine suitable for 24/7 continuous operation?
Yes. The automatic grease pump is specifically designed for continuous industrial schedules with minimum operator attention.
12. What is the recommended installation height for the grease reservoir?
Mount reservoir at or above pump inlet level to ensure positive suction. Max vertical distance: 1.5 metres.
Author & E-E-A-T Credentials
Author: Dr. Chen Wei
Title: Senior Mechanical Engineer, Pelletising Systems Division
Experience: 14 years in biomass densification and feed processing equipment design
Notable Projects:
- Commissioned 12 automatic-lubrication pellet lines across Indonesia, Vietnam, and Nigeria (2018–2025)
- Developed predictive bearing wear model based on grease consumption data
- Co-author of “Industrial Pellet Mill Maintenance and Optimisation” (Engineering Press, 2022)
Affiliation: Shandong Changsheng Machinery Co., Ltd.
