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The Rush Machinery Model 252S is the most versatile semi-automatic drill and tool grinder available today. The 252S can grind odd numbered fluted tools (1, 3, 5, & 7) as well as even numbered fluted tools (2, 4, 6, 8, & 10).
The power-driven workhead of the semi-automatic version offers a quiet, smooth rotation of the workhead. Manual effort is reduced for heavier grinding and spin grinding operations. Sparkout is allowed to occur by using a minimum of manual infeed along with a reduction in workhead rotation. The speed is controlled by a conveniently located valve; the adjacent four-way valve allows grinding in either direction. A hand knob on the workhead is used for indexing and setup.
The innovative design of the 252S allows for the grinding of almost any drill geometry, and most are completed in a single chucking. The versatility also extends to taps, reamers, countersinks and endmills. Many of these tools can be ground with very little change in setup.
This semi-automatic version is equipped with the automatic infeed system. This can increase productivity by allowing the operator to do other nearby tasks while the drill is being ground. The system allows manual or semi-automatic grinding of all tool grinding, and use of the automatic infeed for standard drill points, countersinks and reamers. The grinding rate is adjustable and the counter can be preset for 1-99 cycles. An electroplated CBN wheel (standard) is used with the automatic infeed and requires no dressing. Larger, three-phase motors are standard and an ammeter is provided to monitor the grinding load.
Specifications - Model 252S w/Automatic Infeed
Capacity: 3/32" to 2" (2.5 to 51mm) diameter straight or taper shank
Drill Point Angles: 40 to 180+ degrees
Motor: TEFC 1/2 Hp, 115/230V, 60 hz, single-phase (standard on manual and semi-automatic versions). TEFC 1 Hp, 208-230/460V, 60 Hz, three-phase (standard on auto-infeed version; optional on manual and semi-automatic versions). 50 hz & other voltages are available.
Dimensions: 44" (118 cm) wide x 42" (107 cm) deep x 53" (135 cm) high.
SAMPLE TOOL GRINDING: Send us some sample tools for grinding. Let us know your application and needs. We'll grind your tools for you to test.
FREE VIDEO: See all the Rush drill and tool grinder models on our 13 minute video. Contact us for a free copy.
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