Parts for Keuffel and Esser Slide Rules

HOW TO ORDER

Model Numbers: Keuffel & Esser slide rule model numbers often have alphabetic prefixes and suffixes.  For example "N4081-3" indicates a "new" revsionof already existing model 4081-3.  These revisions usually amounted to nothing more than a re-arrangement of the scales; the physical sizesof models with and without the "N" are absolutely identical.  Any case or cursor that fits a model without the "N" will also fit the model with the "N."  The "N" was usually dropped after couple of years when people had gotten used to the new scale arrangement.
    The suffix indicated what kind of case the rule came in.  4081-3S (and N4081-3S) came in a sewn leather case.  4081-3F came in an imitationleather fiber case.  So, ignore the alphabetic prefixes and suffixes when looking for parts for you slide rule.  If yourrule is marked "N4093-3F," just look for model 4093-3.
    The -1 or -3 or -5 in the model number does make a difference.  "-1" indicated a "five-inch" rule; "-3" a ten-inch rule and "-5" a 20-incher.  Twenty-inch rules usually--but not always--use slightly different cursors from the corresponding ten-inch versions.

Quantities are limited (sometimes only one).  USED ITEMS HAVE BEEN CLEANED AND RECONDITIONED.  If what you need is not available check back later; maybe we'll find one somewhere.  Email us if you need something not on this list or if you're not sure what you need.

Unfortunately we had had a rash of parts destroyed or lost using USPS 1st class, so now we have to send parts out using USPS small package with tracking in a 7x5 in bubble padded envelope. Shipping is $7 for fasteners and lens, and cursors USPS Ground. Use the PayPal button to order, with a description of what you need. Combine these items with one or more duplicate slide rule adoptions. Note: If the OEM glass lens or cursor blocks are shown as "N.A." (not available), we a variety of Replica Laser cut acrylic lens $5 blanks or $10 if I add the hairline or have too hand fabricate a lens.

 Fits  Item Part No. Price each
4035, 4035S
Complete Cursor.
B
N. A.
4158, 68-1892, K-12 Prep  CompleteCursor. Pic
M6
$15 New
4097, 4097B, 4097C, 4097D, 4098  Complete Franeless Cursor. Pic
(Old N2) 99-6811
$25 New
4098A (Improved Glass Cursor) Complete Cursor. Pic
(Old N3) 99-6812
$25 New
4056, 4058C, 4058W, N4058W   (Variety of cursor designs) Complete Cursor.All-glass wood blocks Pic
M2 AGC
$15 Used
Complete Cursor Molded Plastic Pic
M2 Plastic
$15 Used
Complete Cursor. Chrome Metal Pic
M2 CM
$15 Used
4181-1(C),E4181J, 68-1261, 68-1282, 68-1287  CompleteCursor.  Pic
  XW
68-2124
$30 NIB
Window (only) for XW cursor. Pic
12W
68-2179
$14 New
Window (only) for XW cursor. Pic
12W
68-2179
$7 used
Metal Window Frame (only) for XW cursor. Pic
12F
$7 used
1-1/8"wide Closed Body Slide Rules:

4045, 4051, 4054(no K scale on face), 4055, 4094, 4096(Metal), 4100, 4101, 4143, 4165, 4045S, 4051S, 4053-3, 4053-3S, N4035, N4035S, N4041, N4041F, N4041FS, N4041S, N4053-2, N4053-2S, N4053-3, N4053-3F,N4053-FS, N4053-3S, N4053-5, N4053-5S, N4094, N4100, N4100S, N4101, N4101S.


Frameless AGC cursor
Pic
E
AGC
$40 Used
Frameless window
4
$25 used
Complete NIC Cursor, 1 inch wide.  Pic
EL
$30
Complete AGC Cursor with notch for reading K scale on bottom edge of rule.Pic
FL

N.A.
Window (only) for EL and FL cursors above.   Pic
4L
$14 Used
Metal window frame for EL and FL cursors above.
4F
$7 Used
Complete Narrow Cursor, 1.8 cm (23/32inch) wide (After c. 1960)
VW 68-2139
$30 NIB
Window (only) for VW cursor. 
10W
$16 New
All duplex rules K&E Brass Cursor Screw. Pic
used
$2 Used
S.S. Cursor Screw. Pic
new
$2 Used
Mahogany Body/Stator Screw. Pic
3/8" L
$5 Used
Plastic Body/Stator Screw. Pic
5/16" L
$5 Used
10-inch:  4041, 4100, 4100S  with frameless cursor Frameless Window 
3
N. A. 
10-inch:  4061, 4065, 4071, 4095 with frameless cursor  Frameless Window Pic
5
$25 New
5-inch duplex:  4088-1, N4135S, 4095-1 with frameless cursor Frameless Window 
8
$16
New
1-3/16" x 1/4" duplex rules including  4088-2, 4088-3, 4095-3 CompleteCursor. Pic
GL
99-6809
$50 NIB
CompleteCursor. Pic
GL
$40 Used
Frameless Window
6
$16 New
Window (only) for GL framed cursor.   Pic
6L/6W
99-6819
$16 New
Metal Window Frame only  Pic
6F
$7 Used
1-5/16" x 1/4" duplex rules including 4070-3, 4071-3, 4139, 68-1254, 68-1259, 68-1460, 68-1465, 68-1497, 68-1502. CompleteCursor. Pic
PL
N/A New
CompleteCursor. Pic
PL
$40 Used
Frameless Window
9 N. A.
Window (only) for PL framed cursor . Pic
9L/9W
$16 Used
Metal Window Frame only.  Pic 9F N.A.
1-5/8" x 3/16" duplex rules including 4181-3, E4181, N9081-3.  Uses  #7, 7W plastic windows, 7F frames listed below. Complete Cursor.   Pic
RW
$30 used (new SS screws)
1-5/8" x 1/4" duplex rules including  4090, 4090-3, 4091, 4091-3, 4092, 4902-3, 4160 Chemist Rule and others. Complete Frameless All-Glass Cursor with plastic indicator bars . 1915-1935 with K&E Logo & Patent Imprints
Note: This generation uses drilled glass lens Pic
I
$75 Used
Replica Laser cut Acrylic Indicator Windows (Lens). Pic
L-KE-5
$10 new
1-5/8" x 1/4" duplex rules including  4080-3, E4081, 4081-3, 4082-3, 4083-3, 4088-5, 4090-3, 4091-3, 4092-3, 4092-5 after 1930, 4093-3, 4095-5, 4102, 4128, 4142, 4160.   Uses  #7, 7L/7W, 7F windows and frames listed below.  Complete New Improved Cursor. 1938-1955 with K&E Logo & Patent Imprints
Note: This generation uses 7L glass lens Pic
IL(logo)
$50 Used
Complete Cursor. 1956+ (blank)
Note: This generation uses 7W unbreakable lens Pic
IL(blank)
$40 used
Complete Cursor. 3-D (blank) used OEM 7L Window & 7F Frames, New SS screws Pic
IL(3d)
$35 used
OEM Cursor block non-spring side) Pic
IL NS
$15 used
OEM Cursor block spring side) Pic
IL S
$20 used
3-D Cursor block pair, drilled, tapped and pinned spring. Pic
3-D Pair
W/ Screws
$25
1-5/8" x 5/16" duplex rules including 4080-5, 4081-5, 4083-5, 4088-5, 4092-5 before 1930, 4093-5.   Newly assembled from used K&E parts and new plastic bars made with a 3-D printer. Complete Cursor.  Pic
IaL
$55
3-D IaL Cursor block pair, drilled, tapped and pinned spring. Pic
3-D Pair
W/ 8 Screws
$30
1-5/8" wide Simplex rules including 4096, N4096, 4175, U.S. Army Short Base Triangulation Rule    New plastic bars made with a 3-D printer. Complete Cursor w/ ISRM Acrylic laser-cut frameless lens.Pic
3D JL
$45
3-D Cursor block pair, drilled, tapped and beam spring. For OEM 7 frame and glass lens or ISRM Acrylic laser-cut frameless lens. Pic
3-D JL Pair
W/ 4 Screws
$25
All 1-5/8"-wide duplex rules using JW, RW, IL, or IaL cursors. Frameless Window.
7
N. A.
Window (only) for framed cursors. Pic
7L
$7 Used
Unbreakable Window (only)(Plastic) for framed cursors. Pic
7W (Old 7L) 68-2176
$18 New
$12 Used
Metal Window Frame only. (May have small rust spots)Pic
7F
$7 Used.
Clip-on magnifier for the following models:

1-5/8" x 1/4" duplex rules including 4080-3, E4081, 4081-3, 4082-3, 4083-3, 4088-5, 4090-3, 4091-3, 4092-3, 4092-5 after 1930, 4093-3, 4095-5, 4102, 4128, 4142, 4160..
Single lens - Folds up when removed from rule.   Pic 68-2233 $65 New
Double Lens- Folds up when removed from rule.   Pic 68-2224 $85.New
Non-Folding Magnifier, clips of Pic
4185C
$50 Used
5-inch  All-Plastic 68-1130 Decilon 5 CompleteCursor. Pic 68-2104 NA
Window.  Pic 68-2170 $16 New
10-inch  All-Plastic 68-1100 Decilon 10 Complete Cursor.  Pic 68-2105 N. A.
Window. Pic 68-2171 $16 New
Window. Pic 68-2171 $8 Used
Clip-on magnifier for the following models:

4045, 4051, 4053-2, 4053-3,4053-5,  4054, 4055, 4088-2, 4088-3, 4094, 4095, 4095-3, 4096(Metal), 4100, 4101, 4143, 4150-1, 4153-1, 4161-1, 4161-3, 4165, N4035, N4041, N4053-2, N4053-3,, N4053-5,  N4094, N4100, N4101, N4133, 68-1486, 68-1576, 68-1581, 68-1586, 68-1607, 68-1612, 68-1617, 68-1622, 68-1643, 68-1648, 68-1775, 68-1786, 68-1791.
Folds up when removed from rule.   Pic 4185-1 N.A.
Non-Folding Magnifier Pic
4185-B
$50 Used

How To Order - Buying and Shipping

  • Small parts, like cursors and blocks: Unfortunately we had had a rash of parts destroyed or lost using USPS 1st class, so now we have to send parts out using USPS small package with tracking in a 7x5 in bubble padded envelope. Shipping is $7 for fasteners and lens, and cursors USPS Ground. Combine these items with one or more duplicate slide rule adoptions.
  • For slide rules look at the Duplicates page. Click on the comparable image or its accession number to see the matching slide rule in the ISRM archives.
  • The one selected and the one you will receive is a duplicate of this image, and in most cases is in better condition (exceptions noted).
  • Description of NOS = New Old Stock or NIB = New In Box.
  • If you desire an original manual (as available) include an extra $10. It may not be the exact model year.
  • If you want a photo of your selected slide rule before ordering, send us an email or we can text it to your phone.
  • When you make a PayPal donation, list the Accession #s of the items you want..
  • For every $100 gifted select a $10 slide rule from the list to throw in the stack for free.
  • A single slide rule costs $8 to ship. 5 slide rules cost $12. Shipping will be combined .Currently USPS is wanting $16 for a Priority Mail medium Flat Rate box. (holds up to 20 slide rules, without sleeves).
  • Make a reasonable offer. Most suggested fees are based on averaging past ebay prices over the last two years..
  • All proceeds go to supporting ISRM.
  • You can deduct your monetary gift that is in excess above the recommended fee on your U.S. taxes.
  • Satisfaction guaranteed.

The Secure Donations button allows you to direct your donation to the following ISRM programs.

  • Slide Rule Sales/Adoption Fees
  • Gift from Friends of the Museum
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  • Cash Gift - New ISRM Friend
  • School Loaner Program Support

Use the secure button, and include a donation for shipping costs List the items by ISRM reference #. in the message to curator.


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