Lapmaster
72
Lapmaster 72 is a floor-standing single-sided ring polishing machine. Lapmaster 72 has a 72-inch plate diameter. Lapmaster 72 uses four conditioning rings.[1][2][3]
What it is
The Lapmaster 72 is a ring-type flat polishing and lapping machine with a 72-inch plate diameter. The machine is a floor-standing, single-sided system in the Model 72 series.[4][2][1]
The Model 72 is available in open-face and pneumatic-lift versions. The machine series includes a polishing configuration and a lapping configuration.[2][1]
How it works
The Lapmaster 72 works by pressing conditioning rings against a rotating lap plate to produce and maintain flatness on the working surface. The machine uses a free abrasive slurry that is supplied from a separate reservoir with a pump and stirrer.[2][1]
The Model 72 uses a cruciform structural steel base and roller yokes that can be adjusted vertically and laterally. The arrangement supports wear compensation during prolonged operation and allows the plate surface to be corrected by changing the ring position relative to the plate track.[2][1]
Where it fits in the process flow
General reference — not yet source-verifiedThe Lapmaster 72 sits in the finishing stage of a flat-surface manufacturing flow. The machine is used after earlier shaping operations when final flatness, surface condition, or parallelism must be established or corrected.
The Model 72 is used as a floor-standing single-sided machine rather than a wafer-processing lithography tool. The process interacts with abrasive slurry, conditioning rings, and a rotating plate before downstream inspection or subsequent finishing steps.
Applications
The Lapmaster 72 is used for flat polishing and lapping of planar workpieces. The machine can be configured for open-face operation or pneumatic-lift operation.[2][1]
The machine is used with conditioning rings, abrasive slurry, and optional diamond slurry dispensing. The Model 72 is suited to processes that require controlled material removal and flatness control on large circular plates.[2][1]
What do the numbers mean?
Power & electrical4
Dimensions & facilities8
- Dimensions (Pneumatic Lift)
- 124 inches x 110 inches x 108 inches (3150 mm x 2794 mm x 2743 mm)[1]
Configuration & options30
Vintage & configurations
Documented models & variants
| Designation | Generation | Vintage | Changes | Source |
|---|---|---|---|---|
| Model 72 Open Face Flat Polishing Machine | — | — | Described as an open-face version of the Model 72 with four conditioning rings and a 15 kW/20 hp drive unit. | lapmaster-wolters.co.uk[2] |
| Model 72 Polisher | — | — | Described with 27 in ID rings, 5-32 RPM speed range, 25 HP drive, and 480 V electrical specification. | Equipment inventory listing[4] |
| 72" Lapmaster, Open-Face, (4) 27" ID Rings, 5-32 RPM, 25HP, Slurry System, 2001 | — | 2001 | Listed with open-face configuration, four 27-inch ID rings, 5-32 RPM speed, 25 HP drive, and slurry system. | libertymachinery.com[3] |
| Open Face (OF) | — | — | No worktable; dimensions 100x110x63 inches, weight 15000 lbs. | web.archive.org[1] |
| Pneumatic Lift (PL) | — | — | Includes pneumatically adjustable worktable; dimensions 124x110x108 inches, weight 20000 lbs. | web.archive.org[1] |
| Model 72 Open Face | — | — | Open Face configuration. | web.archive.org[1] |
| Model 72 Pneumatic Lift | — | — | Pneumatic Lift version. | lapmaster-wolters.co.uk[2] |
What replaced it?
Alternatives
Tools documented as functional equivalents — same process step and wafer size, from a different manufacturer. Each equivalence cites its source.
- Applied Materials Mirra 3400— Same function class: CMP, nullCompare in depthsource[3]
- SCREEN AS 2000— Same function class: CMP, nullCompare in depthsource[3]
- Applied Materials Mirra Mesa— Same function class: CMP, nullCompare in depthsource[3]
- Strasbaugh 6 DF DC 1— Same function class: CMP, nullCompare in depthsource[3]
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
Not publicly documented
The following facts about the 72 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 72 are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 72 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 72 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 72 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 72 are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (4)Every fact above is drawn from these public sources
- [1]web.archive.org — catalog.lapmaster.com (Jan 17, 2021)web.archive.org
- [2]lapmaster-wolters.co.uk — lapmaster-wolters.co.uklapmaster-wolters.co.uk
- [3]libertymachinery.com — libertymachinery.comlibertymachinery.com
- [4]Inventory photo
Last updated Oct 1, 2026.
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The Strasbaugh 6 DF DC 1 is a refurbished single-station CMP (chemical mechanical polisher) with a 24-inch capacity overarm spindle polisher.
The SCREEN / DNS AS 2000 is a CMP (Chemical Mechanical Polisher) for 8-inch wafers.
The Applied Materials Mirra 3400 is a chemical mechanical planarization (CMP) system for 150 mm and 200 mm wafer processing.
Applied Materials Mirra Mesa is a CMP (Chemical Mechanical Polisher) with a 4-head, 3-platen polisher system module.
