Facts You Should Know About B&S Chuck Levers:
  • Lever heels are form ground for smooth operation.
  • Precision machining for virtually identical levers ensures equal stress, longer wear, and even chucking pressures.
  • We save you the time and trouble of trying to match up pairs.

B&S Screw machine Services, Inc. chuck levers are precision manufactured to ensure even chucking pressures. The result: less piece to piece variation. Our levers are built to operate several million times at deflections up to .055 in. Other brands may break after fewer than 250,000 deflections of only .040. Specifying B&S levers is one of the ways you can cut your down time.

We subject our competitor's parts to exacting tests. Then we make ours better. That's one of the ways we make sure you always get the best from B&S.

Relay on National Distribution,Inc. your authorized B&S distributor. We are available with technical backup whenever you need it.


Facts You Should Know About B&S Front Box Roller Bearings:
The quality of the bearings in a fine machine tells a lot about how that machine will perform. To see why B&S Screw Machine Services, Inc. bearings give you longer spindle life, compare our front box roller bearings with those of a competitor. You benefit from the difference in decreased downtime.

B&S bearings offer these advantages:

  • Superior accuracy and hardness, for longer running times under all extremes of temperature,speed, and cutting pressure.
  • Electronically gauged and segregated into matched sets-all diameters are alike within .00025 in.
  • B&S genuine replacement parts help you keep your competitive edge.
Characteristics Competitor's Brand Brown & Sharpe
# of rolls in the bearing 14 single roll 30 double roll
roller diameter .2498-.2499in. with some anomolies .2499-.2500 in.
variations in roller diameter .000130 in. .000025 in.
surface finish 5-20 microinch 5 microinch
roller hardness 57 Rockwell C 64 Rockwell C


Facts You Should Know About The B&S Chuck Fork Sleeve:

  • Sleeves of high-quality chrome alloy steel are precision ground and heat treated.
  • Balls are matched to within 25 millionths for longer life.
  • Outer race is broken, not cut, for smoother running.
  • Inner race bore is broached and ground.
  • Double sleeve life, by rotating 90 degrees to a new position when wear occurs.

Short cycle work at high spindle speeds puts especially heavy stress on the chuck fork sleeve, which takes the full force applied against the levers each time the collet is closed. With B&S Screw Machine Services, Inc. replacement sleeves, you get trouble free operation without spindle distortion or stock push back. Our sleeves are built to last longer for less downtime. With improved control of the collet mechanism, you get better piece to piece uniformity.

For a healthy return on your investment, keep your equipment healthy with genuine S&B replacement parts. Call your authorized B&S distributor: National Distribution.


Facts You Should Know About The B&S Chuck Lever Fulcrum:
The more wear-resistant the fulcrum, the better it stands up to chucking pressures, the more even the chucking pressure, and the less strain on front and rear spindle bearings. That adds up to longer life and less downtime with B&S Screw Machine Services, Inc. fulcrums- unsurpassed for toughness, hardness, and stiffness.

  • Fulcrums are made of high chromium alloy steel - the same steel used in armor piercing shells.
  • Precision production with gauging at all stages means replacements are just like originals. You don't waste time hand fitting to mating parts.
  • Very close tolerances between the central bore and the parallel slots assure you of a true running spindle and longer bearing life.

Cutting corners on replacement parts can cost you more in the long run.Keep your production up with genuine B&S replacement parts. Call your authorized B&S distributor: National Distribution, Inc.


Cam Rolls and Pins
B&S cam rolls and pins provide even wear through accuracy and high concentricity. With these rolls you can expect:

  • Concentricity of .0001 T.I.R. for exact cross and turret slide motion.
  • Ground bore with no drag on pins, no slide on cams, no flat spots.
  • Chrome-plated pins for less friction between the roll and pin than between the roll and cam.
Part Name Used On O.D. I.D. Length Pin/Flat Tool No.
No. 00 Machines-Prior to Serial #12852
Pin Lead Lever & Cross Slides .250 --- 1.125 Flat 91-90-83
Roller Lead Lever & Cross Slides .500 .250 .310 --- 91-215-8
Pin Cross Slides .250 --- 1.031 Flat 91-90-645
No. 00 Machines-Beginning Serial #12852 and 542-00-3300
Pin Lead Lever .250 --- 1.312 Pin 91-90-705
Pin Cross & Vertical Slides .250 --- 1.031 Pin 91-90-700
Roller Lead Lever,Cross & Vert. Sl. .500 .250 .371 --- 91-215-211
Pin Lead Lever,Cross & Vert. Sl. .250 --- 1.250 Pin 91-90-738
No. 0 Machine- Prior to Serial #8020
Pin Lead Lever & Cross Slides .250 --- 1.125 Flat 91-90-83
Roller Lead Lever & Cross Slides .562 .250 .371 --- 91-215-9
#0 Machine- Beginning Serial #8020
Pin Lead Lever .250 --- 1.312 Pin 91-90-705
Pin Cross & Vertical Slides .250 --- 1.125 Pin 91-90-83
Roller Lead Lever,Cross & Vert. Sl. .562 .250 .434 --- 91-215-212
Pin Cross & Vertical Slides .250 --- 1.250 Pin 91-90-738
Roller Lead Lever,Cross & Vert. Sl. .562 .250 .371 --- 91-215-9
#2 Machines- Prior to Serial #7351
Pin Lead Lever & Cross Slides .312 --- 1.187 Flat 91-90-82
Roller Lead Lever & Cross Slides .625 .312 .434 --- 91-215-3
#2 Machines- Beginning Serial #7315 and 542-2-3100
Pin Lead Lever,Cross & Vert. Sl. .312 --- 1.312 Pin 91-90-752
(Except 542-2-3100)
Roller Lead Lever, Cross & Vert. Sl. .625 .313 .496 --- 91-90-752
Pin Lead Lever(ser#542-2-3100) .31 --- 1.813 Pin 42-17185
#2 Ultramatic
Pin Lead Lever .311 --- 2.000 Pin 42-17185-1
Roller Lead Lever .625 .313 .623 --- 42-21653