Teletype Model 28 Reperforator Gear Charts
- Aux Reperf, LRB, LMRB, LTRK

Info from BSP 573-121-800TC, Issue 3 & 573-123-800TC, Issue 1

Single Speed Drive Gear Sets for Auxiliary Mounted LPR Sets (for ASR Dome Reperf)

Gear Set Driven Gear Pinion Unit Code WPM Baud
161811 161790-44T 161784-18T 7.42 60 45.45
161812 161791-47T 161785-24T 7.42 75 56.88
161813 161792-39T 161786-26T 7.42 100 74.2
173820 173822-49T 173821-20T 7,00 65 45.45
163448 163447-49T 163446-22T 7.00 71 50
163451 163450-40T 163449-27T 7.00 107 75
*319920 319919-51T 319918-25T 7.00 65 45.5
*319923 319922-52T 319921-28T 7.00 71 50
*319926 319925-26T 319924-21T 7.00 107 75

* Used with 3600 RPM Motor


Speed Change Gears for Self-Contained Sprocket Driven Reperforator (LRB) - for ROTR

Gear Set Pinion Driven Gear O.P.M. W.P.M. Unit Code Baud
161519 161104-11T 161103-49T 461.7 67 7.42 50
161654 156982-9T 156981-44T 420 60 7.42 45.45
161655 156984-12T 156983-47T 525.7 75 7.42 56.88
161656 156986-14T 156985-42T 685 100 7.42 74.2
*176295 176296-15T 176297-43T 692 107 7.00 75
**311283 311272-14T 311273-52T 461.7 67 7.42 50
**321547 321548-37T 321549-49T 685 100 7.42 74.2
**324480 324471-9T 324479-36T 900 150 7.42 113

   Use 156400 Sprocket Pulley
* Must use 162218-29T Sprocket Pulley
** Used with 3000 RPM motor


Gear Arrangements for Multiple Mounted Reperforators Driven at Common Speed (LMRB)

Note - Motor Gear and Cross-Shaft Sprocket fit onto 1/2" dia. cross shaft

Unit Code 7.42 7.42 7.42 7.00 7.00 7.00
WPM 60 75 100 71 65 107
Baud 45.45 56.88 74.2 50 45.45 75
Motor Gear Set 161530 161533 161536 None None None
   Pinion 161532-9T 161535-12T 161538-14T 164337-9T 164339-10T 164339-10T
   Gear 161531-44T 161534-47T 161537-42T 164338-40T 164340-37T 164340-37T
Mod Kit for Reperf 161680 161680 161680 161680 173584 162213
   Hub 161509 161509 161509 161509 161509 162215
   Cross-Shaft Sprocket 161510-16T 161510-16T 161510-16T 161510-16T 161510-16T 162214-20T
   Retainer 161511 161511 161511 161511 161511 162216
   Belt 161520-64T 161520-64T 161520-64T 161520-64T 162222-69T 161520-64T
   Reperf Sprocket 156400-28T 156400-28T 156400-28T 156400-28T 173583-37T 156400-28T

Gear Arrangements for Multiple Mounted Reperforators Driven at Independent Speeds (LMRB)

Note - Motor Gear and Cross-Shaft Sprocket fit onto 1/2" dia. cross shaft

Unit Code 7.42 7.00 7.00 7.42 7.00 7.42 7.00
WPM 60 71 65 75 107 100 121
Baud 45.45 50 45.45 56.88 75 74.2 84.7
Motor Gear Set 161530 None None 161530 None 161530 None
   Pinion 161532-9T 164337-9T 164339-10T 161532-9T 164339-10T 161532-9T 164337-9T
   Gear 161531-44T 164338-40T 164340-37T 161531-44T 164340-37T 161531-44T 164338-40T
Mod Kit for Reperf 161680 161680 **173584 162213 162213 162217 *173023
   Hub 161509 161509 161509 162215 162215 162220 162220
   Cross Shaft Sprocket 161510-16T 161510-16T 161510-16T 162214-20T 162214-20T 162219-27T 162219-27T
   Retainer 161511 161511 161511 162216 162216 162221 162221
   Belt 161520 161520 162222 161520 161520 162222 162222
   Reperf Sprocket 156400-28T 156400-28T 173583-37T 156400-28T 156400-28T 162218-29T ***156400-28T

*Non-Typing Reperfs only
**Modification Kit contains sprocket and drive belt ports for 3 reperfs
***156400 not included order separately


Gear Sets For Send-Receive Keyboard Base (LTRK) - for 28KTR

Gear Set Pinion Teeth Driven Gear Teeth Unit Code WPM Baud
151060 151130(S) 14 151131(F) 96 7.42 60 45.5
161293 159278(N) 14 159279(N) 96 7.42 60 45.5
152766 152765(S) 13 152764(F) 81 7.42 67 50
151075 151132(S) 17 151133(F) 93 7.42 75 50
161294 159281(N) 17 159282(N) 93 7.42 75 50
151100 151134(S) 20 151135(F) 84 7.42 100 74.2
161295 159284(N) 20 159285(N) 84 7.42 100 74.2
163504 163461(N) 18 163462(N) 117 7.00 71 50
163505 163463(N) 24 163464(N) 104 7.00 107 75
173195 173794(N) 14 173793(N) 100 7.00 65 45.5