What types of electric motor applications does The Gund Company provide insulation solutions for?

The Gund Company provides solutions for power utilization equipment and motor applications, including electric motors, and offers a variety of insulation component solutions for rotors and stators.

What are the main insulation components for electric motor rotors and stators?

For rotors: topsticks, wedges, pole collars, slot liners, turn-to-turn insulation, pole blocking, and lead clamps. For stators: topsticks, wedges, filler strips, phase separators, slot liners, tapes, tie cord, lead wire insulation, terminal boards, lead clamps, end winding support rings, end winding support blocks, felt, and end baffles.

What insulation materials and parts are used in DC motors and armatures?

DC stator insulation includes pole collars, turn-to-turn insulation, lead clamps, and blocking. DC armature insulation includes topsticks, wedges, slot filler, slot liners, felts, commutator mica segments, lead wire insulation, and banding tape.

What commutator insulation materials and components are available?

Commutator insulation components include Mica HD, mica V-rings, and binding tape.

What other motor insulation components does The Gund Company offer?

Other motor insulation components include elastomeric gaskets, terminal box gaskets, enclosure gaskets, O-rings, riser trays, convolute lead trays, washer and bushings, shaft seals, threaded rod, and insulated tubing.

What quality standards and engineering approach does The Gund Company use for motor insulation parts?

Custom-fabricated parts adhere to ISO 9001:2015 certified quality systems. The Gund Company employs a consultative engineering approach, collaborating closely with customers to identify optimal material choices and ensure engineered components that meet or exceed mechanical and electrical criteria for major OEMs.

What are some common rigid insulation materials used in electric motors?

Common rigid insulation materials include Mica M, G-3 (PF GC 201), G-9 (MF GC 201), Mica HD, G-11 (EP GC 203), GPO-3 (UP GM 203), G-10 (EP GC 201), GPO-1 (Class F, H, R; UP GM 201), C, CE, LE, PFCC 201/202/204, N155, N180, H755, EMD Grades, T160, N220, SG200, FR4 (EP GC 202), Side Ripple Spring, Top Ripple Spring, Semi-Conductive Laminate C109, MagNohl®, HST II, and PCGP-HT.

What are some common flexible insulation materials used in electric motors?

Common flexible insulation materials include Dacron/Mylar/Dacron (DMD), polyester PET film, Rag/Mylar (RMR), Nomex/Mylar/Nomex (NMN), Nomex® meta-aramid papers, epoxy coated Nomex®, G-Flex™ meta-aramid papers, vulcanized fibre, Kapton tape, and PTFE tape.

What are some common elastomeric materials used in motor insulation and sealing?

Common elastomeric materials include neoprene, cork-rubber, nitrile, EPDM, silicone, FKM (Viton®), butyl, and sponge.

DC Motors >50HP

workhorses of industrial facilities

DC motors larger than 50 HP

For DC motors above 50 HP, the applications are typically industrial processes that require high starting torque, wide speed range, precise speed control, frequent acceleration/deceleration, or four-quadrant operation. Although many new installations use AC variable-frequency drives (VFDs), large DC motors remain common in legacy and specialized applications.

Market Segment	Typical HP Range	Common Applications
Steel Mills	100 – 5,000+ HP	Rolling mills, reversing mills, coilers, shears
Paper Mills	75 – 2,000 HP	Paper machines, winders, unwinders, calenders
Mining	100 – 3,000 HP	Mine hoists, draglines, conveyors, crushers
Cranes & Material Handling	50 – 1,000+ HP	Gantry cranes, ladle cranes, hoists
Marine	100 – 5,000 HP	Propulsion drives, winches, deck machinery
Rubber & Plastics	100 – 1,500 HP	Extruders, mixers, calenders
Cement	100 – 2,000 HP	Kiln drives, grinding mills
Textile	50 – 500 HP	Large processing lines, winders
Transportation	100 – 5,000+ HP	Electric locomotives, subway systems (legacy)
Heavy Manufacturing	50 – 1,000 HP	Presses, machine tools, draw benches

DC ARMATURE INSULATION

Topsticks
Wedges
Slot Filler
Slot Liners
Felts
Commutator Mica Segments
Lead Wire Insulation
Banding Tape

DC STATOR INSULATION

Pole Collars
Turn-to-Turn Insulation
Lead Clamps
Blocking

Commutator Insulation

Mica Segments
Mica V-Rings
Binding Tapes

Insulation Materials in Motor Applications



Mica M	G-3, PF GC 201	G-9, MF GC 201
Mica HD	G-11, EP GC 203	GPO-3, UP GM 203
G-10, EP GC 201	Class F GPO-1, UP GM 201	Class H GPO-1, UP GM 201
C, CE, LE – PF CC 201, 202, 204/305	N155	N180
Class R GPO-1, UP GM 201	H755	EMD Grades
Top Ripple Spring	T160	N220
Side Ripple Spring	FR4, EP GC 202	SG200
Semi-Conductive Laminate: C109	MagNohl®	HST II
PCGP-HT
Click here to view additional material datasheets.

Flexible Insulation Materials in Motors

	Dacron®/Mylar®/Dacron® (DMD)	Polyester PET Film
	Rag/Mylar®/Rag (RMR)	Nomex®/Mylar®/Nomex® (NMN)
	Nomex® Meta-Aramid Papers	Epoxy Coated Nomex®
	G-Flex™ Meta-Aramid Papers	Vulcanized Fibre
	Kapton® tape	PTFE Tape
	Click here to view additional material datasheets.

Elastomeric Materials in Motors

	Neoprene	Cork-Rubber
	Nitrile	EPDM
	Silicone	FKM (Viton®)
	Butyl	Sponge
	Click here to view additional material datasheets.