Surface Grinder

STP-618 Series

Saddle Type

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Feature
Grinding Cycles
Specification
Accessories

Feature

3 HP V3 grade spindle motor for powerful output to achieve precision work and better grinding capability.

Cartridge spindle w/4 preloaded class 7(p4) bearings and run-out of taper nose better than 0.000060" T.I.R provides quiet, vibration free operation for better work pieces accuracy.

Manually operated 0.000050" micro down feed and micro cross feed. (STD on STP-618CII, optional on all other models)

Vertical handwheel at the waist level. (STP Only)

The table traverses on linear ball bearings with hardened and ground guide ways to ensure a smooth and easy movement.

Double V cross ways are hand scraped and Turcite-B coated for greater flatness and high wear resistance.

All castings are tempered and stress relieved twice to assure stability of the machine structure and resist deflection under load.

Hardened & ground column ways with cast spindle slide is precision fit for no "hang-up" gravity down-feed.

Indexable table handwheel for ease of operation. (618M only)

Work table flatness shall be within 0.00012".

Grinding Cycles

Cll Grinding mode

Step cross

Plunge

Crisscross

CXll Grinding mode

Step cross

Plunge

Crisscross

Slice

Specification

Model	STP-618M	STP-1A618	STP-2A618	STP-618CII	STP-618CXII
General Capacity
Table Size	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)
Max. Grinding Length	19" (480mm)	19" (480mm)	19" (480mm)	19" (480mm)	19" (480mm)
Max. Grinding Width	6" (170mm)	6" (170mm)	6" (170mm)	6" (170mm)	6" (170mm)
Distance from Table Surface to Spindle Centerline	19.3" (490mm)	19.3" (490mm)	19.3" (490mm)	19.3" (490mm)	19.3" (490mm)
Standard Magnetic Chuck Size	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)	6" x 18" (150 x 450mm)
Longitudinal Movement
Manual Travel	20.9" (530mm)	20.9" (530mm)	20.9" (530mm)	20.9" (530mm)	20.9" (530mm)
Hydraulic Travel	-	20" (510mm)	20" (510mm)	20" (510mm)	20" (510mm)
Table Speed (infinitely variable)	-	16-82 fpm (5-52m/min)	16-82 fpm (5-52m/min)	16-82 fpm (5-52m/min)	16-82 fpm (5-52m/min)
Cross Movement
Manual Travel	7" (180mm)	7" (180mm)	7" (180mm)	7" (180mm)	7" (180mm)
Rapid Travel, approx.	-	-	38ipm(960mm/min)	38ipm(960mm/min)	38ipm(960mm/min)
Automatic Traverse Travel	-	-	6-3/4"(170mm)	6-3/4"(170mm)	6-3/4"(170mm)
Automatic Traverse Increment	-	-	0.02-0.24"(0.4-6mm)	0.02-0.24"(0.4-6mm)	0.0001-0.002"(0.001-0.05mm)
Handwheel per Graduation	0.001" (0.02mm)	0.001" (0.02mm)	0.001" (0.02mm)	0.001" (0.02mm)	-
Handwheel per Revolution	0.2" (5mm)	0.2" (5mm)	0.2" (5mm)	0.2" (5mm)	-
Vertical Downfeed
Rapid Travel, approx.	-	-	-	4ipm (100mm/min)	4ipm (100mm/min)
Automatic Traverse Increment	-	-	-	0.0001-0.002" (0.001-0.05mm)	0.0001-0.002" (0.001-0.05mm)
Handwheel per Graduation	0.0001" (0.005mm) 0.000050"(0.0001mm)-Option	0.0001" (0.005mm) 0.000050"(0.0001mm)-Option	0.0001" (0.005mm) 0.000050"(0.0001mm)-Option	0.000050"(0.0001mm) micro downfeed	0.000050"(0.0001mm) micro downfeed
Handwheel per Revolution	0.050" (1mm)	0.050" (1mm)	0.050" (1mm)	0.050" (1mm) micro downfeed	0.050" (1mm) micro downfeed
Grinding Wheel
Wheel Size (OD x W x B)	ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)	ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)	ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)	ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)	ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)
Speed (50Hz/60Hz)	2850rpm/3450rpm	2850rpm/3450rpm	2850rpm/3450rpm	2850rpm/3450rpm	2850rpm/3450rpm
Motor
Spindle Motor	3HP (2.3kw)	3HP (2.3kw)	3HP (2.3kw)	3HP (2.3kw)	3HP (2.3kw)
Crossfeed Motor	-	-	25w	25w	1/2HP (0.4kw)
Elevating Motor	-	-	-	1/2HP (0.4kw)	1/2HP (0.4kw)
Hydraulic Motor	-	-	1HP (0.75kw)	1HP (0.75kw)	1HP (0.75kw)
Floor Space
Total Space Required (L x W x H)	76" x 43" x 69" (1950 x 1100 x 1770mm)	76" x 43" x 69" (1950 x 1100 x 1770mm)	76" x 59" x 69" (1950 x 1500 x 1770mm)	76" x 59" x 69" (1950 x 1500 x 1770mm)	76" x 59" x 69" (1950 x 1500 x 1770mm)
Weight
Net, approx.	1588lbs (722kgs)	1588lbs (722kgs)	1775lbs (807kgs)	1775lbs (807kgs)	1775lbs (807kgs)
Gross, approx.	1808lbs (822kgs)	1808lbs (822kgs)	1995lbs (907kgs)	1995lbs (907kgs)	1995lbs (907kgs)
Other
Total Rated Power, approx.	3HP (2.3kw)	4HP (3kw)	4.1HP (3.1kw)	4.6HP (3.5kw)	5HP (3.8kw)
Packing Dimension (L x W x H)	58" x 44" x 76" (148 x 110 x 194cm)	58" x 44" x 76" (148 x 110 x 194cm)	58" x 44" x 76" (148 x 110 x 194cm)	61" x 49" x 76" (155 x 124 x 194cm)	61" x 49" x 76" (155 x 124 x 194cm)

Accessories

Standard Accessories

Diamond Dresser

Splash Guard (except 618M)

Wheel Extractor

8" x ½" x 1¼" wheel and wheel flange

Balancing Arbor

Machine Lamp

Dust Guard

0.000050" Micro downfeed (STP-618CII only)

Optional Accessories

MAGNETIC CHUCKS AND CONTROLS

Electromagnetic chuck

Auto. Demagnetizer

Permanent magnetic chuck

DIGITAL READOUT SYSTEMS

One axis (Elevating) digital readout

Two axis (Z & Y axis) digital readout

COOLANT SYSTEMS

Coolant system w/mag. sep.& paper filter (20L/min, 100L)

Combination coolant & dust collector (50L)

Dust collector

Splash guard

OTHER ACCESSORIES

Manual parallel dressing attachment

Balancing stand

Spare wheel 8" x ½" x 1¼"

Spare wheel flange

Micro down feed (0.000050")

Micro cross feed (0.000050")

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