Motion Feedthroughs

Rotary & Linear Feedthroughs

Series Options

VFR-E — Economy (no scale, lowest cost)
VFR-S — Standard (anodized housing with scale)
VFR-HT — High Temperature (all SS housing)
VFR-P — Precision (micrometer option, low backlash)
VFR-HD — Heavy Duty (up to 240 in-lb torque)

All rotary FT include a scale (except Economy). Housings are aluminum, except VFR-HT which is all stainless steel.

Spec	Economy	Standard	Hi Temp	Heavy Duty	Precision
Bake temp (°C)	200	200	315	200	200
Operating temp (°C)	−20 ~ 150	−20 ~ 150	−20 ~ 315	−20 ~ 150	−20 ~ 150
Scale resolution	5°	5°	5°	5°	5°
Max torque	125 in-oz	125 in-oz	125 in-oz	5 ft-lb	320 in-oz
Flange (CF)	CF1.33 / 2.75	CF1.33 / 2.75	CF1.33 / 2.75	CF2.75	CF2.75
Flange (KF)	KF16 / 40	KF16 / 40	—	KF40	KF40
Leak rate	1 × 10⁻⁹ cc/s

VFR-E — Economy

P/N	Flange	Description	Wt (lb)
VFR-E-CF133	CF 1.33″	Rotary feedthrough, aluminum, no scale	0.6
VFR-E-CF275	CF 2.75″	Rotary feedthrough, aluminum, no scale	1.1
VFR-E-KF16	KF16	Rotary feedthrough, aluminum, no scale	0.6
VFR-E-KF40	KF40	Rotary feedthrough, aluminum, no scale	1.0

VFR-S — Standard

P/N	Flange	Description	Wt (lb)
VFR-S-CF133	CF 1.33″	Rotary feedthrough, anodized with scale	0.6
VFR-S-CF275	CF 2.75″	Rotary feedthrough, anodized with scale	1.1
VFR-S-KF16	KF16	Rotary feedthrough, anodized with scale	0.6
VFR-S-KF40	KF40	Rotary feedthrough, anodized with scale	1.0

Same overall dimensions as Mini Economy.

VFR-HT — High Temperature

P/N	Flange	Description	Wt (lb)	Drawing
VFR-HT-CF133	CF 1.33″	High-temperature rotary, 304 SS with scale	0.6
VFR-HT-CF275	CF 2.75″	High-temperature rotary, 304 SS with scale	1.1

Same dimensions as VFR-S except all stainless body and housing.

VFR-P — Precision

Low backlash
Rotary position lock
Manual or motorized
Resolution: 2°

P/N	Flange	Description	Wt (lb)
VFR-P-CF275	CF 2.75″	Compact design, 1/4″ shaft	3.0
VFR-P-KF40	KF40	Compact design, 1/4″ shaft	2.5

VFR-HD — Heavy Duty

Ø 0.375″ shaft
Manual or motorized
Resolution: 2°

P/N	Flange	Description	Wt (lb)
VFR-HD-CF275	CF 2.75″	Vernier scale, CF flange	5.0
VFR-HD-KF40	KF40	Vernier scale, KF flange	4.3

Actuator Options

Manual, bellows-sealed
Pneumatic, bellows-sealed
Electric, bellows-sealed
Magnetically coupled

Miniature magnetically coupled rotary feedthrough — UHV compatible and most economical among all rotary FT options. Not suitable for fast reciprocating applications.

Available in CF1.33 flange only

Key Specifications

Actuator: Manual or pneumatic
Max torque: 3.5 in-lb
Bake temperature: 150 °C
Etched scale: 5° increments
Resolution: 1°
Vacuum range: 1 × 10⁻¹¹ Torr
Shaft: Ø 6 mm with tap hole

Five design variations for different requirements. Housings are aluminum (except VFL-HT which is all stainless). Rotary dial included; VFL-P uses a precision micrometer. Higher loads up to 110 lb axial available. Pneumatic style requires male 1/8″ NPT fitting.

Series Map

Standard = VFL-S
High Temp = VFL-HT
Push/Pull = VFL-PP
Precision = VFL-P
Heavy Duty = VFL-HD

Actuators

Manual (bellows-sealed), Pneumatic (bellows-sealed), Electric motor (bellows-sealed), Magnetically coupled.

Spec	Standard	Hi Temp	Push/Pull	Precision	Heavy Duty
Bake temp (°C)	200	315	200	200	200
Operating temp (°C)	−20 ~ 150	−20 ~ 250	−20 ~ 150	−20 ~ 80	−20 ~ 150
Dial resolution	0.002″ (0.5 mm)	0.002″	—	0.0001″	0.002″
Linear resolution	0.05″	0.05″	0.05″	0.0001″	0.05″
Max axial load	10 lb	10 lb	25 lb	5 lb	50 lb
Max lateral load	15 lb	5 lb	20 lb	5 lb	20 lb

VFL-S — Standard

Available in manual or motorized. Vacuum-wetted areas are stainless steel. Motor resolution: 51,200 microsteps/rev.

P/N	Flange	Stroke	Length	Wt (lb)
VFL-S-CF133 × 1.0	CF 1.33″	1.0″	4.47″	1.0
VFL-S-CF133 × 2.0		2.0″	5.85″	1.5
VFL-S-CF133 × 4.0		4.0″	8.61″	2.5
VFL-S-CF275 × 1.0	CF 2.75″	1.0″	4.47″	1.5
VFL-S-CF275 × 2.0		2.0″	5.85″	2.0
VFL-S-CF275 × 4.0		4.0″	8.61″	3.0
VFL-S-KF16 × 1.0	KF16	1.0″	4.47″	1.0
VFL-S-KF16 × 2.0		2.0″	5.85″	1.5
VFL-S-KF16 × 4.0		4.0″	8.61″	2.5

For Product Spec, Drawing, and Quote

Please call: 510-498-8518

Or send RFQ to sales@vacproducts.com