Grinding
Spindle Quills
for High-Tolerance Machining

Selecting the proper spindle grinding quill is a critical factor for a successful inner diameter grind operation. Increase the utility of your spindles and the range of your machining capabilities in these ID applications with GMN grinding quills. These quality quills allow your CNC spindles to reach into the deep recesses of a workpiece for expert grinding and abrasive machining. Think of quills as a telescopic extension of your spindle, empowering your machining operations with easy access to those hard-to-finish spots.

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benefits of GMN Grinding Quills

Available for GMN standard and HSK interfaces
Precision threads

• A selection of right and left-hand direction threaded quills
are readily available

• Precision balancing for higher RPM applications

Standard quills for interfaces from D14 / 23 up to D36 / 68
Precision threads
A selection of right and left-hand threaded quills
are readily available
Precision balancing for higher RPM applications
Accommodations for special design needs

Accessories available at GMN USA permit the customization of the tool interface for any connection.

Finished Grinding Quills

GMN produces grinding quills with round and flat contact face accuracy for all available GMN standard tool interfaces.

* Fig 3: Threaded pin not in delivery complement

Interface	K [mm]	H [mm]	Grinding Wheel E x F [mm]	G [mm]	Grinding Wheel Fixation	H₀ [mm]
D 14/23
	6	20	10 x 10	4	KI	8
	10	25	16 x 16	6	PS/PL	8
	16	32	25 x 25	10	PS/PL	8
D 16/28
	10	25	16 x 16	6	PS/PL	10
	13	32	20 x 20	8	PS/PL	10
	16	40	25 x 25	10	PS/PL	10
D 22/38
	13	32	20 x 20	8	PS/PL	12
	20	40	32 x 25	13	PS/PL	12
	25	50	40 x 32	16	MU	12
D 28/43
	16	40	25 x 25	10	PS/PL	12
	20	50	32 x 25	13	PS/PL	12
	32	63	50 x 40	20	MU	12
D 32/53
	20	50	32 x 25	13	PS/PL	12
	32	63	50 x 40	20	MU	12
	40	80	63 x 40	25	MU	12
D 36/63
	25	50	40 x 32	16	MU	15
	32	63	50 x 40	20	MU	15
	50	100	80 x 40	32	MU	15
D 36/68
	32	63	50 x 40	20	MU	15
	40	80	63 x 40	25	MU	15
	56	125	100 x 40	36	MU	15

Fitting hole for fig. 2 and 3

d₁	M	L5	L6
4	M3	5	8
6	M5	7	11
8	M6	9	12
10	M8	12	14
13	M12	13	17

Semi-Finished Grinding Quills

GMN semifinished products allow individual adaptation of the tool receiver for any type of connection.

GMN Standard Tool Interface

These semi-finished products are for interfaces D08/14 to D36/63. Right-hand direction of rotation is available at short notice, while other dimensions and left-hand direction of rotation is available upon request.

Interface	K [mm]	H [mm]
D 08/14	14	70
D 09/16	16	84
D 10/18	18	90
D 14/23	23	135
D 16/28	28	229
D 16/33	33	180
D 22/38	38	174
D 28/43	43	240
D 32/53	53	235
D 36/63	63	150

HSK Interface

These semi-finished products are for interfaces HSK-C25 — HSK-C100, with other dimensions available upon request.

Interface	W [mm]	K [mm]	H [mm]	L [mm]	H 0 [mm]	Weight [kg]
HSK-C25	25	30	90	100	10	1
HSK-C32	32	41	139	150	11	1.50
HSK-C40	40	51	169	180	11	2.81
HSK-C50	50	64	186	200	14	4.92
HSK-C50	50	64	76	90	14	2.15
HSK-C63	63	81	186	200	14	7.90
HSK-C63	63	81	86	100	14	3.89
HSK-C80	80	101	193	210	17	12.90
HSK-C100	100	124	208	225	17	21.70

Custom-Designed Grinding Quills

If you have a unique ID grinding challenge, let GMN USA engineer a solution. We can design custom quills to fulfill any project requirement. Our experts will help you determine the optimum quill length, diameter, and stiffness for optimal performance in your custom quill’s intended application.

Additional GMN Spindle Accessories

Experience unmatched quality, exacting tolerances, and on-time, reliable deliveries when you combine GMN USA quills, spindles, and other CNC spindle accessories.

SHOP ALL SPINDLE ACCESSORIES

Need Help Finding What’s Right for You?

At GMN USA, our team has years of expertise in all things spindles- including the ideal accessories for your machine. When evaluating your needs, we look at your production requirements, tolerances, and the material you’re machining. Tell us about your project, and we’ll match with the right accessories for your operation.

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Grinding Spindle Quills for High-Tolerance Machining