THE GMT GRIP DOWN CHUCK (GDC)

The GMT Grip Down Chuck (GDC)

GMT Pull Down Chucks are ideal for second operations especially for finishing operation on auto components. They have a pull-back function of ensuring positive resting of the component against the chuck front face after clamping.
DIMENSIONAL SPECIFICATIONS ( in mm unless specified otherwise )
GMT MODEL NUMBER 38-548-06 38-276-17 61-81 38-800-04
SIZE PARAMETERS 165 210 254 305
A (mm)165210254305
B (mm)8595115130
ØC H6 (mm)140190220275
D (mm)32383535
E (mm)5555
F (mm)104.8133.4171.4235
G (mm)16172228
H max (mm)587198.2102
H min (mm)54.467.492.896.6
I (Bolt holes)M10 – 6 nos.M12 – 6 nos.M16 – 3 nos.M16 – 6 nos.
J (Draw bolts)M14 – 1 noM10 – 2 nos.M10 – 2 nos.M16 – 2 nos.
K (mm)35454565
L max (mm)14142019
L min (mm)4454
M (mm)36365048
N (mm)262636
O (Thread)M16M20M20M20
P max (mm)333823.555
P min (mm)23288.540
Q g6 (mm)10161620
R H7 (mm)10121217
S (mm)6777
T (mm)2.8333
TECHNICAL SPECIFICATIONS
SIZE PARAMETERS 165 210 254 305
Jaw Stroke (mm) 7.2 7.2 5.4 5.4
Puller Stroke (mm) 10 10 15 15
RPM Max 3500 3000 3000 3000
Max Draw Bar Pull (Kgf) 1500 2500 2500 2500
Max Gripping Force (Kgf) 2520 4500 4500 4500
Weight (Kg) 14 27 46 62
RECOMMENDED CYLINDERS FOR THE GMT GDC CHUCK
CHUCK SIZE 165Ø 210Ø 254Ø 305Ø
HYDRAULIC CYLINDER (CH-S) 105Ø 120Ø 120Ø 160Ø

OUR GDP FAQ

The GMT Grip Down Chuck (GDC) is a high-precision workholding device designed for secure gripping and accurate machining operations. It ensures strong clamping force and stability during high-speed CNC applications.
The GDC is suitable for a wide range of engineering materials including steel, alloy steel, and other machinable metals used in precision manufacturing and industrial applications.
The main advantages include high gripping force, improved machining accuracy, reduced vibration, and reliable performance at high RPMs, making it ideal for precision CNC operations.
The Grip Down mechanism ensures that the workpiece is pulled downward and firmly clamped, reducing movement during machining and improving cutting stability and surface finish.

Regular cleaning, proper lubrication, and periodic inspection of jaws and internal components are recommended to ensure long service life and consistent performance.

The Gmt Grip Down Chuck (Gdc)

GMT Pull Down Chucks are ideal for second operations especially for finishing operation on auto components. They have a pull-back function of ensuring positive resting of the component against the chuck front face after clamping.

DIMENSIONAL SPECIFICATIONS ( in mm unless specified otherwise )
GMT MODEL NUMBER 38-548-06 38-276-17 61-81 38-800-04
SIZE PARAMETERS 165 210 254 305
A (mm)165210254305
B (mm)8595115130
ØC H6 (mm)140190220275
D (mm)32383535
E (mm)5555
F (mm)104.8133.4171.4235
G (mm)16172228
H max (mm)587198.2102
H min (mm)54.467.492.896.6
I (Bolt holes)M10 – 6 nos.M12 – 6 nos.M16 – 3 nos.M16 – 6 nos.
J (Draw bolts)M14 – 1 noM10 – 2 nos.M10 – 2 nos.M16 – 2 nos.
K (mm)35454565
L max (mm)14142019
L min (mm)4454
M (mm)36365048
N (mm)262636
O (Thread)M16M20M20M20
P max (mm)333823.555
P min (mm)23288.540
Q g6 (mm)10161620
R H7 (mm)10121217
S (mm)6777
T (mm)2.8333
TECHNICAL SPECIFICATIONS
SIZE PARAMETERS 165 210 254 305
Jaw Stroke (mm) 7.2 7.2 5.4 5.4
Puller Stroke (mm) 10 10 15 15
RPM Max 3500 3000 3000 3000
Max Draw Bar Pull (Kgf) 1500 2500 2500 2500
Max Gripping Force (Kgf) 2520 4500 4500 4500
Weight (Kg) 14 27 46 62
RECOMMENDED CYLINDERS FOR THE GMT GDC CHUCK
CHUCK SIZE 165Ø 210Ø 254Ø 305Ø
HYDRAULIC CYLINDER (CH-S) 105Ø 120Ø 120Ø 160Ø