MPI Beltless Magnetic Conveyors (BLM)

Overview

The MPI Beltless Magnetic Conveyor, Series BLM, is built by Magnetic Products, Inc. Permanent magnets ride on a chain inside a sealed housing and pull ferrous scrap along a nonmagnetic stainless steel slider bed. With no belt, there's nothing to wear out, mistrack, or slip. Production Resources, Inc. (PRI) helps stamping and machining plants size and configure BLM conveyors for press scrap, chips, turnings, fasteners, and stampings.

For a full overview of how beltless magnetic conveyors work and where they fit in a scrap handling system, see our beltless magnetic conveyors guide.

Key Features

• Wear and impact resistant slider bed
  • Stainless steel, 12 gauge minimum, and 7 gauge on beds over 18″ wide. A manganese bed is available.
• Low magnetic drag
  • The magnets are wrapped in UHMW and carried on stainless supports. The motor mount is welded stainless.
• Automatic chain tensioning
  • An enclosed internal take-up keeps the chain tight for the life of the unit.
• Welded steel track
  • Welded structural steel angle, with stainless in the high-wear convex and concave sections. There's no plastic track or laminated light-gauge channel.
• Submersible, liquid-tight housing
  • Only the drive motor assembly moves outside the housing, so the conveyor can be fully submerged in a machine reservoir tank. An oil bath lubricates the chain.
• American-made drive
  • A US-manufactured Baldor TEFC drive package is standard. A customer-specified drive is also available.

Product Line / Models

Each larger series has a deeper body for bigger magnet cartridges and a heavier chain, for tougher scrap or higher rates:

• BLM-600 – 6.5″ body depth, #2052 chain, 11 gauge body, magnet centers from 5″, slider bed from 6″ wide
• BLM-800 – 8.5″ body depth, #2062 chain, 11 gauge body, magnet centers from 6″, slider bed from 8″ wide
• BLM-1200 – 13.875″ body depth, #2082 chain, 7 gauge body, magnet centers from 8″, slider bed from 12″ wide

Layouts are horizontal straight, incline straight, or dogleg, with a horizontal (standard), nose over (small scrap, compact designs), or continuous radius (long pieces) discharge head.

Applications & Benefits

• Press scrap removal: In an MPI case study, a Series 1200 BLM handled 6.5 lbs. of scrap per press stroke, 24/7, for seven years (over 10,000,000 lbs.).
• Hot, jagged stampings: Handles scrap that would destroy a conventional belt.
• Chips and turnings: Removes steel chips, turnings, and wet fines from under CNC lathes, grinders, and milling centers.
• Finished fasteners: Carries finished fasteners to bins.
• Submerged service: Submerged tank designs are available for filtration and heat treat applications.
• Cleaner floors: The sealed design helps control oil and coolant carryover.

Technical Specifications

Standard values and selectable options from MPI's Series BLM data sheet:

• Infeed length: 30″ minimum
• Slider bed width: 6″ to 24″ in 2″ steps from each series' minimum. Overall body width is bed width plus 4″ (plus 2″ on the special compact design).
• Slider bed material: 12 gauge stainless under 18″ wide and 7 gauge at 18″ and wider. Options: 7 gauge manganese impact plate, or a rigidized or dimpled surface to cut part friction.
• Angle of incline: 0–90° in 15° steps, or custom
• Minimum discharge length: body width for nose over; 22″ for horizontal; at least 22″ for continuous radius, depending on the incline
• Speed: 45 FPM constant with a gear reducer. Other speeds can be set based on testing.
• Magnets: Ceramic is standard. Options are ceramic plus REN rare earth sweepers that break up surges, or high-capacity REN rare earth with a stainless body for lower drag.
• Power: 230/460 V, 3 phase, 60 Hz standard. Also available in 115/230 V 1 phase or 575 V 3 phase.
• Drive location: Offset drive standard, or underhead or overhead chain drive. The motor mounts on the right (standard) or left.
• Other options: VFD speed control, side guides (2″ standard, custom, or zero radius), legs and casters, controls, smoke covers, inspection doors, separate lanes for parts and scrap, a coolant port, an integrated hopper, and oil skimmer or coolant filtration integration

See the MPI BLM in Action

How to Choose the Right MPI Beltless Magnetic Conveyor

1. Longest piece: MPI sets magnet centers at about 1.5 times the longest part or scrap piece, which points toward a series.
2. Scrap rate and difficulty: Tougher scrap or higher rates call for a larger series. MPI testing shows whether ceramic magnets are enough.
3. Layout and discharge: Infeed length, incline angle, discharge height, straight or dogleg shape, and discharge head style.
4. Environment: Submerged tanks, hot parts (smoke cover), or abrasive parts (manganese bed).
5. Utilities: Available power and drive/motor location.

Why MPI Beltless Magnetic Conveyors Are Trusted

• Proven at scale: In 2010 MPI built what it reports as the world's longest beltless magnetic conveyor (101 feet), and it has delivered a 224′ underground central scrap system using BLMs.
• Engineered from testing: MPI tests applications in its in-house research facility before recommending a conveyor.
• Full project support: MPI offers removal of old equipment plus installation and startup services.

Contact & Ordering

Need help picking the right model or getting a quote? Provide these details:

• Scrap or part type, longest piece, and condition (hot, oily, sharp, abrasive)
• Scrap rate (for example, pounds per stroke and strokes per minute)
• Press type and tonnage, or the machine the conveyor will serve
• Infeed length, incline angle, discharge height, and floor space
• Whether the conveyor will be submerged in a coolant or oil tank
• Power supply and any control requirements

Contact PRI to discuss specs, lead times, and installation support.