Lathe Chucks Pakistan Standard and Types

                  Lathe Chucks Pakistan

Lathe Spindle Nose Mounting Systems

To determine which type of spindle nose mounting your lathe requires, consult the diagrams below, then read the chart beneath the appropriate diagram. Make the measurement required. This will give you the exact type of mounting for the lathe spindle nose.

American Standard Type D1 – Camlock

The Type D1 Camlock mounting is used on lots of Engine Lathe spindles. Each pin on the chuck side has a “D” shape cutout. For quick measurement, measure from center of spindle to center of pin, “D” (D=1/2F). When mounting, you use your chuck key to rotate a cam in the spindle side that pulls the pin in snug.

Spindle nose size A Bmax C D E F
D1 – 3 92 53.983 11 32 3×15.1 70.6
D1 – 4 117 63.521 11 34 3×16.7 82.6
D1 – 5 146 82.573 13 38 6×19.8 104.8
D1 – 6 181 106.385 14 45 6×23 133.4
D1 – 8 225 139.731 16 50 6×26.2 171.4
D1 – 11 298 196.883 18 60 6×31 235
D1 – 15 403 285.791 19 70 6×35.7 330.2
D1 – 20 546 412.795 21 82 6×42.1 463

Chuck Types

Self-Centering Chucks are ideal for gripping cylindrical or concentric work because all jaws work in unison and automatically center the piece. Independent chucks are suited for gripping irregularly shaped workpieces or for eccentric operations because jaws work independently. Adjustable chucks operate like a self-centering chuck but are used where extreme accuracy is required. User may adjust within .0005 T.I.R.


Chuck Mounting Information: Using Intermediate Plates –
For Standard Flat Back Lathe Chucks-

NOT for “Adjustable Run-Out” models (see separate instructions). When using a Chuck Adapter Plate to mount a flat back lathe chuck: 1. The lathe must be levelled with a precision level, this assures machining accuracy
2. Adapter plate or chuck plate is to be mounted on lathe spindle
3. A skim facing cut across the full face of the adaptor must be made. This assures that the face is at 90° to the centerline of the lathe spindle
4. The chuck plate has a boss onto which the recess in back of the chuck must mount. Turn the boss to fit tightly into the chuck body. The accuracy of this operation is directly relative to best results
5. Turn the O.D. of the chuck plate to match the chuck — not always the same size of the chuck body, especially with 4 jaw independent chucks
6. In most cases the chuck has threaded holes in the chuck body, to accept mounting bolts, or the chuck plate has threaded holes, for chucks having through holes in the body for front insertion. In some instances it may be necessary to transfer hole locations and drill clearance holes
7. “A” type adaptors come in two versions: A-1 has two bolt circles (inner & outer), A-2 has a single bolt circle (outer) of tapped holes. The chuck adaptor is fastened to spindle separately, then the chuck is fastened to the plate
8. Lathes having threaded spindle noses follow similar procedures 1 thru 6