STK Machine Repairs, Inc.
Specializing in Bridgeport Parts & Service Repairs

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Find your replacement parts with our On-line Parts Manual, then simply fax to 847-888-0897.
Bridgeport Series I parts diagrams are below:
Used Machinery for sale:
For Sale:
Used/Rebuilt Bridgeport mills
For Sale:
Used/Rebuilt surface grinders
Variable Speed Lower Housing Assembly

Item No. Part No. Description Item No. Part No. Description
11565Hex head screw 371498Ball bearing gear sleeve washer
21566Brake shoe pivot sleeve 381507Bearing sleeve
31127Brake bearing cap 391492Snap ring (2 req.)
41558Ball bearing 401491Ball bearing (2 req.)
51563Brake shoe set 411493Bull gear bearing spacer
61562Brake spring (2 req.) 421508Wave spring washer
71561Stationary drive variable disc 431530Key
81262Brake lock pin 44-A1161Splined gear hub
91260Socket set screw 44-B037-0739CNC Splined gear hub
101261Brake lock handle 451506Bearing locknut
111259Plastic ball 461520Hi-Low shift crank
121592Sleeve for brake lock shaft 471522Roll pin
131307Socket set screw 481521Hi-low pinion block
141593Brake lock shaft 491518Socket head cap screw (2 req.)
151463Roll pin 501502Socket head cap screw
161594Brake lock cam 511514Socket set screw
171587Brake finger pivot stud 521510Hi-low detent plate
181588Brake operating finger (2 req.) 531517Hi-low detent plunger spring
191030-03Snap ring 541516Hi-low detent plunger
201575Belt housing belt 551509Bull gear shift pinion
211523Socket head cap screw 561494Gear housing
221574Taper pin (2-req.) 571578Rivet drive screw
231585Gear housing plate 581581Quill feed name plate
241584Round head machine screw (3 req.) 591495Vertical T-bolt (3 req.)
251524Socket head cap screw 601496Steel washer (3 req.)
261525Motor pulley cover 611497Hex jam nut (3 req.)
271258Hex jam nut 621579Hi-low range name plate
28-A1146Timing belt pulley 1.5 HP 631523Socket head cap screw (4 req.)
28-B1539Timing belt pulley 2 HP 641504Oil cup
291534Socket head cap screw (2 req.) 651499Fixed clutch bracket
301533Bull gear pinion bearing cap 661503Dowel pin
311531Wave spring washer 671501Guide for clutch bracket (2 req.)
321277Ball bearing (2 req.) 681152Flat head cap screw (2 req.)
331490Spindle bull gear assembly 691500Socket set screw
341529Bull gear pinion counter shaft 701511Hex nut (3 req.)
351505Compression spring (3 req.) 711512Lock washer (3 req.)
361279Key 721513Studs (3 req.)



For more information, please call
(847) 888-0797
STK Machine Repairs, Inc.
500 N. La Fox St.  
South Elgin, IL 60177
www.stkrebuilders.com