GY 8100 Back Plate For A2 Taper Spindle Nose (DIN 55026)

Engineered for precision and durability, our Type 8100 Back Plates are designed specifically for mounting chucks onto Taper Spindle Noses. These A2-type back plates provide a rigid, high-accuracy interface between your machine spindle and work-holding equipment. Whether you are upgrading your current setup or outfitting a new lathe, these back plates ensure minimal runout and maximum stability for heavy-duty machining..

Key Features

  • A2 Spindle Compatibility: Designed to fit standard A2-4, A2-5, A2-6, A2-8, and A2-11 taper spindle noses.
  • High-Grade Construction: Manufactured from premium materials to withstand high rotational speeds and clamping forces.
  • Precision Machined: Features a pre-machined short taper and through-hole to reduce setup time and ensure perfect alignment.
  • Versatile Sizing: Available in diameters ranging from 160mm (6 ¼”) to 400mm (15 ¾”) to accommodate a wide variety of chuck sizes.
GY 8100 Model Numbers
Size (MM) Size (Inches) Short Taper Through Hole Order Code
160 6 1/4″ 4 42 16101604
160 6 1/4″ 5 42 16101605
200 8″ 4 50 16102004
200 8″ 5 50 16102005
200 8″ 6 50 16102006
200 8″ 8 50 16102008
250 10″ 4 55 16102504
250 10″ 5 65 16102505
250 10″ 6 65 16102506
250 10″ 8 65 16102508
315 12 1/2″ 6 85 16103156
315 12 1/2″ 8 85 16103158
315 12 1/2″ 11 85 161031511
400 15 3/4″ 8 110 16104008
400 15 3/4″ 11 110 161040011
Technical Specification
Spindle Nose A2-4 A2-5 A2-6
Size 160mm 200mm 250mm 160mm 200mm 250mm 200mm 250mm 315mm
A 160 200 250 160 200 250 200 250 315
B 108 108 108 133 133 133 165 165 165
C 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5
D 14.7 14.7 14.7 16.3 16.3 16.3 19.45 19.45 19.45
E 12 12 12 12 12 12 14 14 14
F 63.513 63.513 63.513 82.563 82.563 82.563 106.375 106.375 106.375
G 82.6 82.6 82.6 104.8 104.8 104.8 133.4 133.4 133.4
H 13 13 13 15 15 15 16 16 16
K (Min) 12 50 55 12 50 65 50 65 85
M 28 30 30 28 30 32 30 35 35
N 5 5 5 6 6 6 8 8 8
No. of ‘E’ Holes 4 4 4 4 4 4 4 4 4
Technical Specification
Spindle Nose A2-8 A2-11
Size 200mm 250mm 315mm 400mm 315mm 400mm
A 220 250 315 400 315 400
B 210 210 210 210 280 280
C 8 8 8 8 10 10
D 24.2 24.2 24.2 24.2 29.4 29.4
E 18 18 18 18 20 20
F 139.719 139.719 139.719 139.719 196.869 196.869
G 171.4 171.4 171.4 171.4 235 235
H 18 18 18 18 20 20
K (Min) 50 65 85 110 85 110
M 35 35 35 35 35 35
N 10 10 10 10 10 10
No. of ‘E’ Holes 4 4 4 4 4 4