PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42Boring Machine,cam and Main Bear

Ammco Tools Inc · NSN 4910-00-261-7918 · FSC 4910 · No Item Name Available
Verified by PartsTable
NSN 4910-00-261-7918 — this item is cataloged by the U.S. Government under National Stock Number 4910-00-261-7918. Primary manufacturer part number: 42.
Features
  • Boring Machine,cam and Main Bear — FSC 4910
  • General Characteristics Item Description: PORTABLE,FOR BORING CRANKSHAFT MAIN AND CAMSHAFT BEARING,CAPACITY DATA,1-1/2 IN. MIN BEARING DIA,4 IN. MAX BEARING DIA,60 IN. MAX LG OF CRANKCASE,20 IN. MAX W OF CRANKCASE,12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE,MANNUAL OR DRILL DRIVE,FEEDS,0.0025 IN. PER REVOLUTION,0.005 IN. PER REVOLUTION,0.010 IN. PER REVOLUTION,POWER CAN BE A APPLIED TO EITHER END OF BORING BAR,ACCESSORIES C/O,10 BOLTS,CLAMP,5 BRIDGES,CRANKCASE,1 CASE,CARRYING HARDWOOD OR METAL,6 CLAMPS,C,1 COUPLING,FLEXIBLE DRIVE,1 CRANK,HAND,1 GAGES,BLOCK,CENTERING,FORD V8,1 HONE,1 MANUAL,INSTRUCTION,1 MICROMETER,TOOL SETTING,2 NUTS,FEED,FLANGING PINS,CENTERING,SPECIAL,1 RING,CENTERING,2 IN.,1 RING,CENTERING,2-1/8 IN.,1 RING,CENTERING,2-1/4 IN.,1 RING,CENTERING,2-3/8 IN.,1 RING,CENTERING,2-1/2 IN.,1 RING,CENTERING,2-5/8 IN.,1 RING,CENTERING,2-3/4 IN.,1 RING,CENTERING,2-7/8 IN.,1 RING,CENTERING,3 IN.,4 TOOLS,BORING,4 TOOLS,FLANGING IN
  • Departure From Cited Document: AS MODIFIED BY 12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE AND ACCESSORIES IN
  • 3 verified cross-references
  • Primary manufacturer: Ammco Tools Inc
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Boring Machine,cam and Main Bear, cataloged under National Stock Number 4910-00-261-7918, is classified within Federal Supply Class 4910 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Ammco Tools Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4910-00-261-7918
Primary Part Number42
Item NameBoring Machine,cam and Main Bear
FSC / FSG4910 / 49 — No Item Name Available
ManufacturerAmmco Tools Inc
StatusACTIVE
General Characteristics Item DescriptionPORTABLE,FOR BORING CRANKSHAFT MAIN AND CAMSHAFT BEARING,CAPACITY DATA,1-1/2 IN. MIN BEARING DIA,4 IN. MAX BEARING DIA,60 IN. MAX LG OF CRANKCASE,20 IN. MAX W OF CRANKCASE,12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE,MANNUAL OR DRILL DRIVE,FEEDS,0.0025 IN. PER REVOLUTION,0.005 IN. PER REVOLUTION,0.010 IN. PER REVOLUTION,POWER CAN BE A APPLIED TO EITHER END OF BORING BAR,ACCESSORIES C/O,10 BOLTS,CLAMP,5 BRIDGES,CRANKCASE,1 CASE,CARRYING HARDWOOD OR METAL,6 CLAMPS,C,1 COUPLING,FLEXIBLE DRIVE,1 CRANK,HAND,1 GAGES,BLOCK,CENTERING,FORD V8,1 HONE,1 MANUAL,INSTRUCTION,1 MICROMETER,TOOL SETTING,2 NUTS,FEED,FLANGING PINS,CENTERING,SPECIAL,1 RING,CENTERING,2 IN.,1 RING,CENTERING,2-1/8 IN.,1 RING,CENTERING,2-1/4 IN.,1 RING,CENTERING,2-3/8 IN.,1 RING,CENTERING,2-1/2 IN.,1 RING,CENTERING,2-5/8 IN.,1 RING,CENTERING,2-3/4 IN.,1 RING,CENTERING,2-7/8 IN.,1 RING,CENTERING,3 IN.,4 TOOLS,BORING,4 TOOLS,FLANGING IN
Departure From Cited DocumentAS MODIFIED BY 12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE AND ACCESSORIES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6680-00-101-5427L200 INTERCHANGEABLE
Transmitter,liquid Quantity
Eaton Aerospace Llc Div Fluid and Electrical Distribution Division
6105-01-109-0036L200 INTERCHANGEABLE
Motor,electric
Bear Hydraulics Inc
5985-01-143-495077886-8 INTERCHANGEABLE
Attenuator,variable
L3harris Technologies, Inc. Div Space and Airborne Systems
5360-01-374-97783685 INTERCHANGEABLE
Spring,helical,compression
Carlisle & Finch Co
4320-01-440-5927L200 CI254T INTERCHANGEABLE
Pump,rotary
Megator Corp
8465-01-514-8739SLMP1-1 INTERCHANGEABLE
Restraint,involuntary,full Body
Ltl Vantage, Inc.
5975-01-573-2149 INTERCHANGEABLE
Locknut,electrical Conduit
1240-01-661-8217L200 INTERCHANGEABLE
Mount Subassembly
American Defense Manufacturing Llc
4140-01-675-7796L200 INTERCHANGEABLE
Fan,centrifugal
Broan-Nutone Llc Dba Broan
Cross-Reference Index
Part NumberManufacturer
42 Ammco Tools Inc (USA)
L200 Kw Products Inc Dba Kwik-Way (USA)
42 Hennessy Industries, Llc. (USA)
Related Parts
6680-00-101-5427INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
L200
6105-01-109-0036INTERCHANGEABLE
MOTOR,ELECTRIC
L200
5985-01-143-4950INTERCHANGEABLE
ATTENUATOR,VARIABLE
77886-8
5360-01-374-9778INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
3685
4320-01-440-5927INTERCHANGEABLE
PUMP,ROTARY
L200 CI254T
8465-01-514-8739INTERCHANGEABLE
RESTRAINT,INVOLUNTARY,FULL BODY
SLMP1-1
5975-01-573-2149INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
1240-01-661-8217INTERCHANGEABLE
MOUNT SUBASSEMBLY
L200
4140-01-675-7796INTERCHANGEABLE
FAN,CENTRIFUGAL
L200

Frequently Asked Questions

What is NSN 4910-00-261-7918?

NSN 4910-00-261-7918 is a Boring Machine,cam and Main Bear, manufactured by Ammco Tools Inc, classified under FSC 4910 (No Item Name Available). Status: active.

What are the part numbers for NSN 4910-00-261-7918?

NSN 4910-00-261-7918 has 3 cross-referenced part numbers: 42 (Ammco Tools Inc), L200 (Kw Products Inc Dba Kwik-Way), 42 (Hennessy Industries, Llc.).

What NSN replaces 4910-00-261-7918?

There are 9 known substitutes for 4910-00-261-7918: 6680-00-101-5427, 6105-01-109-0036, 5985-01-143-4950 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 42?

Key specifications for 42: General Characteristics Item Description: PORTABLE,FOR BORING CRANKSHAFT MAIN AND CAMSHAFT BEARING,CAPACITY DATA,1-1/2 IN. MIN BEARING DIA,4 IN. MAX BEARING DIA,60 IN. MAX LG OF CRANKCASE,20 IN. MAX W OF CRANKCASE,12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE,MANNUAL OR DRILL DRIVE,FEEDS,0.0025 IN. PER REVOLUTION,0.005 IN. PER REVOLUTION,0.010 IN. PER REVOLUTION,POWER CAN BE A APPLIED TO EITHER END OF BORING BAR,ACCESSORIES C/O,10 BOLTS,CLAMP,5 BRIDGES,CRANKCASE,1 CASE,CARRYING HARDWOOD OR METAL,6 CLAMPS,C,1 COUPLING,FLEXIBLE DRIVE,1 CRANK,HAND,1 GAGES,BLOCK,CENTERING,FORD V8,1 HONE,1 MANUAL,INSTRUCTION,1 MICROMETER,TOOL SETTING,2 NUTS,FEED,FLANGING PINS,CENTERING,SPECIAL,1 RING,CENTERING,2 IN.,1 RING,CENTERING,2-1/8 IN.,1 RING,CENTERING,2-1/4 IN.,1 RING,CENTERING,2-3/8 IN.,1 RING,CENTERING,2-1/2 IN.,1 RING,CENTERING,2-5/8 IN.,1 RING,CENTERING,2-3/4 IN.,1 RING,CENTERING,2-7/8 IN.,1 RING,CENTERING,3 IN.,4 TOOLS,BORING,4 TOOLS,FLANGING IN; Departure From Cited Document: AS MODIFIED BY 12-1/2 IN. MAX HEIGHT OF CENTER OF BEARING FROM CRANKCASE PAN RAIL SURFACE AND ACCESSORIES IN. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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